{"id":37239,"date":"2025-11-27T15:49:41","date_gmt":"2025-11-27T07:49:41","guid":{"rendered":"https:\/\/www.amagicsoft.com\/?p=37239"},"modified":"2026-03-12T14:46:11","modified_gmt":"2026-03-12T06:46:11","slug":"inaccessible-boot-device","status":"publish","type":"post","link":"https:\/\/www.amagicsoft.com\/es\/wiki\/inaccessible-boot-device.html","title":{"rendered":"Dispositivo de arranque inaccesible"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"37239\" class=\"elementor elementor-37239\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-150f984 e-flex e-con-boxed e-con e-parent\" data-id=\"150f984\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-cb2aa20 e-con-full e-flex e-con e-child\" data-id=\"cb2aa20\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-740cf8c e-con-full e-flex e-con e-child\" data-id=\"740cf8c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-daa546c e-con-full e-flex e-con e-child\" data-id=\"daa546c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-f2c018b e-flex e-con-boxed e-con e-child\" data-id=\"f2c018b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e67244 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"0e67244\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;exclude_headings_by_selector&quot;:&quot;.faq-no-toc&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__0e67244\" aria-expanded=\"true\" aria-label=\"Abrir la tabla de contenidos\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__0e67244\" aria-expanded=\"true\" aria-label=\"Cerrar la tabla de contenidos\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t<div id=\"elementor-toc__0e67244\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3add0fa e-con-full e-flex e-con e-parent\" data-id=\"3add0fa\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-69e487d elementor-widget elementor-widget-text-editor\" data-id=\"69e487d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2 data-start=\"0\" data-end=\"53\">Understanding the \u201cInaccessible Boot Device\u201d Error<\/h2><p data-start=\"55\" data-end=\"217\">The \u201cInaccessible Boot Device\u201d error appears as a blue screen (BSOD) with stop code 0x0000007B.<br data-start=\"150\" data-end=\"153\" \/>It means Windows cannot read the system volume during startup.<\/p><p data-start=\"219\" data-end=\"402\">This error usually does not mean the drive has instantly failed completely.<br data-start=\"294\" data-end=\"297\" \/>Often, the problem is missing storage drivers, a damaged file system, or changes in disk configuration.<\/p><p data-start=\"219\" data-end=\"402\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-37241 size-full\" src=\"https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1.webp\" alt=\"What is Inaccessible Boot Device\" width=\"1350\" height=\"750\" srcset=\"https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1.webp 1350w, https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1-300x167.webp 300w, https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1-1024x569.webp 1024w, https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1-768x427.webp 768w, https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1-18x10.webp 18w, https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2025\/11\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1-710x394.webp 710w\" sizes=\"(max-width: 1350px) 100vw, 1350px\" \/><\/p><h2 data-start=\"404\" data-end=\"443\">Typical Symptoms and Risk Assessment<\/h2><p data-start=\"445\" data-end=\"606\">When this error occurs, the system shows a BSOD before Windows loads.<br data-start=\"514\" data-end=\"517\" \/>You may see messages like \u201cYour PC ran into a problem\u201d with \u201cINACCESSIBLE_BOOT_DEVICE.\u201d<\/p><p data-start=\"608\" data-end=\"634\">Common symptoms include:<\/p><ul data-start=\"636\" data-end=\"805\"><li data-start=\"636\" data-end=\"685\"><p data-start=\"638\" data-end=\"685\">Reboot loop as soon as Windows tries to start<\/p><\/li><li data-start=\"686\" data-end=\"738\"><p data-start=\"688\" data-end=\"738\">BSOD after a driver, firmware, or Windows update<\/p><\/li><li data-start=\"739\" data-end=\"805\"><p data-start=\"741\" data-end=\"805\">BSOD after cloning a system disk or changing SATA mode in BIOS<\/p><\/li><\/ul><p data-start=\"807\" data-end=\"954\">In many cases, user data is still present on the disk.<br data-start=\"861\" data-end=\"864\" \/>The main risk is overwriting or further damaging the file system during repair attempts. Therefore, taking correct <a href=\"https:\/\/www.amagicsoft.com\/data-recovery\/crashed-os-recovery\">crashed OS recovery methods<\/a> is crucial.\u00a0<\/p><h2 data-start=\"956\" data-end=\"1016\">How Windows Accesses the Boot Device (Technical Overview)<\/h2><p data-start=\"1018\" data-end=\"1189\">During startup, the firmware (BIOS or UEFI) initializes hardware and hands control to the boot loader.<br data-start=\"1120\" data-end=\"1123\" \/>On Windows, the process typically involves the following layers:<\/p><ol data-start=\"1191\" data-end=\"1631\"><li data-start=\"1191\" data-end=\"1267\"><p data-start=\"1194\" data-end=\"1267\">Firmware identifies the boot disk (based on boot order or EFI entries).<\/p><\/li><li data-start=\"1268\" data-end=\"1364\"><p data-start=\"1271\" data-end=\"1364\">The firmware loads the Windows Boot Manager from the EFI System Partition or MBR boot code.<\/p><\/li><li data-start=\"1365\" data-end=\"1459\"><p data-start=\"1368\" data-end=\"1459\">Windows Boot Manager reads the Boot Configuration Data (BCD) to locate the system volume.<\/p><\/li><li data-start=\"1460\" data-end=\"1547\"><p data-start=\"1463\" data-end=\"1547\">The kernel loads storage drivers required for the disk controller and file system.<\/p><\/li><li data-start=\"1548\" data-end=\"1631\"><p data-start=\"1551\" data-end=\"1631\">The system volume (NTFS on MBR or GPT) is mounted and Windows starts services.<\/p><\/li><\/ol><p data-start=\"1633\" data-end=\"1788\">If any part of this chain fails \u2014 for example, missing storage drivers or corrupted NTFS metadata \u2014 Windows cannot mount the boot volume and raises 0x7B.<\/p><h2 data-start=\"1790\" data-end=\"1811\"><span style=\"letter-spacing: -1.08px; text-align: inherit;\">Common Root Causes<\/span><\/h2><p data-start=\"1813\" data-end=\"1879\">Several technical issues can trigger \u201cInaccessible Boot Device\u201d:<\/p><ul data-start=\"1881\" data-end=\"2279\"><li data-start=\"1881\" data-end=\"1946\"><p data-start=\"1883\" data-end=\"1946\">Storage controller mode changed (IDE to AHCI or RAID) in BIOS<\/p><\/li><li data-start=\"1947\" data-end=\"2015\"><p data-start=\"1949\" data-end=\"2015\">Outdated or missing disk controller drivers after a major update<\/p><\/li><li data-start=\"2016\" data-end=\"2091\"><p data-start=\"2018\" data-end=\"2091\">Corrupted Boot Configuration Data (BCD) or partition table (MBR or GPT)<\/p><\/li><li data-start=\"2092\" data-end=\"2143\"><p data-start=\"2094\" data-end=\"2143\">Damaged NTFS file system or RAW partition state<\/p><\/li><li data-start=\"2144\" data-end=\"2212\"><p data-start=\"2146\" data-end=\"2212\">Disk cloning to a new SSD with different alignment or controller<\/p><\/li><li data-start=\"2213\" data-end=\"2279\"><p data-start=\"2215\" data-end=\"2279\">Physical disk problems such as bad sectors or failing hardware<\/p><\/li><\/ul><p data-start=\"2281\" data-end=\"2384\">Understanding which category applies is essential before choosing a repair or <a href=\"https:\/\/www.amagicsoft.com\/\">data recovery<\/a> strategy.<span style=\"font-family: Inter; font-size: 40px; font-weight: bold; letter-spacing: -1.08px; text-align: inherit; color: inherit; font-style: inherit; text-transform: inherit;\">\u00a0<\/span><\/p><p data-start=\"2281\" data-end=\"2384\"><span style=\"font-family: Inter; font-size: 40px; font-weight: bold; letter-spacing: -1.08px; text-align: inherit; color: inherit; font-style: inherit; text-transform: inherit;\">\u00a0<\/span><\/p><h2 data-start=\"2386\" data-end=\"2432\">Initial Recovery Actions Before Deep Repair<\/h2><p data-start=\"2434\" data-end=\"2510\">Before running advanced tools, it is important to stabilize the situation:<\/p><ol data-start=\"2512\" data-end=\"2913\"><li data-start=\"2512\" data-end=\"2608\"><p data-start=\"2515\" data-end=\"2608\"><strong data-start=\"2515\" data-end=\"2540\">Stop forced restarts.<\/strong> If the system loops, power it off cleanly using the power button.<\/p><\/li><li data-start=\"2609\" data-end=\"2710\"><p data-start=\"2612\" data-end=\"2710\"><strong data-start=\"2612\" data-end=\"2634\">Check connections.<\/strong> For desktop systems, verify all SATA or NVMe cables and power connectors.<\/p><\/li><li data-start=\"2711\" data-end=\"2818\"><p data-start=\"2714\" data-end=\"2818\"><strong data-start=\"2714\" data-end=\"2738\">Revert BIOS changes.<\/strong> If you recently changed SATA mode or boot order, restore the previous values.<\/p><\/li><li data-start=\"2819\" data-end=\"2913\"><p data-start=\"2822\" data-end=\"2913\"><strong data-start=\"2822\" data-end=\"2850\">Disconnect extra drives.<\/strong> Leave only the system drive connected to simplify detection.<\/p><\/li><\/ol><p data-start=\"2915\" data-end=\"3091\">If the error started after a Windows update or driver installation, rolling back or using <strong data-start=\"3005\" data-end=\"3023\">System Restore<\/strong> from recovery options can sometimes resolve it with minimal risk.<\/p><h2 data-start=\"3093\" data-end=\"3144\">A<span style=\"letter-spacing: -1.08px; text-align: inherit;\">dvanced Repair Techniques for Experienced Users<\/span><\/h2><p data-start=\"3146\" data-end=\"3344\">Advanced users or technicians may attempt direct repair of the boot path and file system.<br data-start=\"3235\" data-end=\"3238\" \/>These methods carry risk, so they are typically performed after critical data is backed up or recovered.<\/p><h3 data-start=\"3346\" data-end=\"3395\">Using Windows Recovery Environment (WinRE)<\/h3><p data-start=\"3397\" data-end=\"3524\">Boot from a Windows installation USB or recovery drive and choose <strong data-start=\"3463\" data-end=\"3487\">Repair your computer<\/strong>.<br data-start=\"3488\" data-end=\"3491\" \/>Then use the following options:<\/p><ul data-start=\"3526\" data-end=\"3696\"><li data-start=\"3526\" data-end=\"3609\"><p data-start=\"3528\" data-end=\"3609\"><strong data-start=\"3528\" data-end=\"3547\">Startup Repair:<\/strong> Automatically attempts to fix boot loader and BCD problems.<\/p><\/li><li data-start=\"3610\" data-end=\"3696\"><p data-start=\"3612\" data-end=\"3696\"><strong data-start=\"3612\" data-end=\"3631\">System Restore:<\/strong> Restores registry and drivers to an earlier, known-good state.<\/p><\/li><\/ul><h3 data-start=\"3698\" data-end=\"3740\">Command-Line Repair of Boot Records<\/h3><p data-start=\"3742\" data-end=\"3777\">From <strong data-start=\"3747\" data-end=\"3765\">Command Prompt<\/strong> in WinRE:<\/p><ul data-start=\"3779\" data-end=\"3985\"><li data-start=\"3779\" data-end=\"3904\"><p data-start=\"3781\" data-end=\"3827\">Repair the boot records on BIOS\/MBR systems:<\/p><ul data-start=\"3830\" data-end=\"3904\"><li data-start=\"3830\" data-end=\"3851\"><p data-start=\"3832\" data-end=\"3851\"><code data-start=\"3832\" data-end=\"3849\">bootrec \/fixmbr<\/code><\/p><\/li><li data-start=\"3854\" data-end=\"3876\"><p data-start=\"3856\" data-end=\"3876\"><code data-start=\"3856\" data-end=\"3874\">bootrec \/fixboot<\/code><\/p><\/li><li data-start=\"3879\" data-end=\"3904\"><p data-start=\"3881\" data-end=\"3904\"><code data-start=\"3881\" data-end=\"3902\">bootrec \/rebuildbcd<\/code><\/p><\/li><\/ul><\/li><li data-start=\"3906\" data-end=\"3985\"><p data-start=\"3908\" data-end=\"3949\">Rebuild boot files on UEFI\/GPT systems:<\/p><ul data-start=\"3952\" data-end=\"3985\"><li data-start=\"3952\" data-end=\"3985\"><p data-start=\"3954\" data-end=\"3985\"><code data-start=\"3954\" data-end=\"3983\">bcdboot C:\\Windows \/l en-us<\/code><\/p><\/li><\/ul><\/li><\/ul><p data-start=\"3987\" data-end=\"4069\">These commands repair the links between firmware, BCD, and the system partition.<\/p><h3 data-start=\"4071\" data-end=\"4108\">Checking File System Integrity<\/h3><p data-start=\"4110\" data-end=\"4148\">Run <strong data-start=\"4114\" data-end=\"4124\">chkdsk<\/strong> on the system volume:<\/p><ul data-start=\"4150\" data-end=\"4171\"><li data-start=\"4150\" data-end=\"4171\"><p data-start=\"4152\" data-end=\"4171\"><code data-start=\"4152\" data-end=\"4169\">chkdsk C: \/f \/r<\/code><\/p><\/li><\/ul><p data-start=\"4173\" data-end=\"4344\">This scans for logical errors and attempts to reallocate bad sectors.<br data-start=\"4242\" data-end=\"4245\" \/>On heavily damaged disks, this can stress the drive, so <a href=\"https:\/\/www.amagicsoft.com\/\">data recovery<\/a> should be considered first.<\/p><h3 data-start=\"4346\" data-end=\"4391\">Offline Registry and Driver Correction<\/h3><p data-start=\"4393\" data-end=\"4672\">Some specialists edit the offline registry to enable generic storage drivers or disable faulty ones.<br data-start=\"4493\" data-end=\"4496\" \/>Tools like <strong data-start=\"4507\" data-end=\"4517\">WinHex<\/strong> or advanced registry editors can modify the SYSTEM hive.<br data-start=\"4574\" data-end=\"4577\" \/>This is powerful but risky and is best left to professionals familiar with Windows internals.<\/p><h2 data-start=\"4674\" data-end=\"4722\">Safe Data Recovery When Windows Will Not Boot<\/h2><p data-start=\"4724\" data-end=\"4904\">When boot errors persist, separating \u201csystem repair\u201d from \u201cdata recovery\u201d is critical.<br data-start=\"4810\" data-end=\"4813\" \/>Windows can be reinstalled at any time, but overwritten user data is often unrecoverable.<\/p><p data-start=\"4906\" data-end=\"4928\">The safest order is:<\/p><ol data-start=\"4930\" data-end=\"5232\"><li data-start=\"4930\" data-end=\"5024\"><p data-start=\"4933\" data-end=\"5024\">Identify signs of hardware failure (unusual noises, SMART errors, repeated I\/O timeouts).<\/p><\/li><li data-start=\"5025\" data-end=\"5104\"><p data-start=\"5028\" data-end=\"5104\">If the drive is failing, consider creating a sector-by-sector image first.<\/p><\/li><li data-start=\"5105\" data-end=\"5177\"><p data-start=\"5108\" data-end=\"5177\">Use read-only <a href=\"https:\/\/www.amagicsoft.com\/\">data recovery software<\/a> to scan the disk or its image.<\/p><\/li><li data-start=\"5178\" data-end=\"5232\"><p data-start=\"5181\" data-end=\"5232\">Copy important files to a different healthy disk.<\/p><\/li><\/ol><p data-start=\"5234\" data-end=\"5453\">A dedicated <a href=\"https:\/\/www.amagicsoft.com\/magic-data-recovery\">data recovery tool<\/a> such as <a href=\"https:\/\/www.amagicsoft.com\/\"><strong data-start=\"5273\" data-end=\"5301\">Amagicsoft Data Recovery<\/strong><\/a> scans at the file system and raw data level.<br data-start=\"5346\" data-end=\"5349\" \/>It rebuilds folder structures and recovers files even when the partition looks RAW or is not bootable.<\/p><h2 data-start=\"5455\" data-end=\"5519\">Recovering Files with Amagicsoft Data Recovery (Step-by-Step)<\/h2><p data-start=\"5521\" data-end=\"5696\">The following workflow shows how to recover data from a system that shows \u201cInaccessible Boot Device.\u201d<br data-start=\"5622\" data-end=\"5625\" \/>You will need a second working Windows machine and an external drive.<\/p><h3 data-start=\"5698\" data-end=\"5745\">Step 1: Remove and Attach the Problem Drive<\/h3><ol data-start=\"5747\" data-end=\"6032\"><li data-start=\"5747\" data-end=\"5792\"><p data-start=\"5750\" data-end=\"5792\">Power off the affected PC and unplug it.<\/p><\/li><li data-start=\"5793\" data-end=\"5867\"><p data-start=\"5796\" data-end=\"5867\">Remove the system disk carefully (follow hardware safety guidelines).<\/p><\/li><li data-start=\"5868\" data-end=\"5951\"><p data-start=\"5871\" data-end=\"5951\">Connect the disk to a working PC using a SATA port, NVMe slot, or USB adapter.<\/p><\/li><li data-start=\"5952\" data-end=\"6032\"><p data-start=\"5955\" data-end=\"6032\">Ensure Windows detects the drive, even if it appears as RAW or unallocated.<\/p><\/li><\/ol><h3 data-start=\"6034\" data-end=\"6089\">Step 2: Install and Launch Amagicsoft Data Recovery<\/h3><ol data-start=\"6091\" data-end=\"6290\"><li data-start=\"6091\" data-end=\"6205\"><p data-start=\"6094\" data-end=\"6205\">On the working PC, download and install <a href=\"https:\/\/www.amagicsoft.com\/\"><strong data-start=\"6134\" data-end=\"6162\">Amagicsoft Data Recovery<\/strong> <\/a>on a healthy internal or external drive.<\/p><\/li><li data-start=\"6206\" data-end=\"6290\"><p data-start=\"6209\" data-end=\"6290\">Start <a href=\"https:\/\/www.amagicsoft.com\/\"><strong data-start=\"6215\" data-end=\"6243\">Amagicsoft Data Recovery<\/strong><\/a> and wait for it to list all connected disks.<\/p><\/li><\/ol><h3 data-start=\"6292\" data-end=\"6326\">Step 3: Select the Source Disk<\/h3><ol data-start=\"6328\" data-end=\"6563\"><li data-start=\"6328\" data-end=\"6388\"><p data-start=\"6331\" data-end=\"6388\">Select the non-bootable system disk as the scan target.<\/p><\/li><li data-start=\"6389\" data-end=\"6484\"><p data-start=\"6392\" data-end=\"6484\">Choose a <strong data-start=\"6401\" data-end=\"6414\">Full Scan<\/strong> or <strong data-start=\"6418\" data-end=\"6431\">Deep Scan<\/strong> mode for maximum recovery on damaged file systems.<\/p><\/li><li data-start=\"6485\" data-end=\"6563\"><p data-start=\"6488\" data-end=\"6563\">Start the scan and allow it to complete without interrupting the process.<\/p><\/li><\/ol><h3 data-start=\"6565\" data-end=\"6613\">Step 4: Preview and Filter Recoverable Files<\/h3><ol data-start=\"6615\" data-end=\"6867\"><li data-start=\"6615\" data-end=\"6688\"><p data-start=\"6618\" data-end=\"6688\">Use file type filters (documents, photos, videos) to narrow results.<\/p><\/li><li data-start=\"6689\" data-end=\"6762\"><p data-start=\"6692\" data-end=\"6762\">Open the <strong data-start=\"6701\" data-end=\"6712\">Preview<\/strong> panel to verify file integrity where available.<\/p><\/li><li data-start=\"6763\" data-end=\"6867\"><p data-start=\"6766\" data-end=\"6867\">Mark critical folders such as <em data-start=\"6796\" data-end=\"6824\">Users\\YourName\\Documents<\/em>, <em data-start=\"6826\" data-end=\"6835\">Desktop<\/em>, and <em data-start=\"6841\" data-end=\"6851\">Pictures<\/em> for recovery.<\/p><\/li><\/ol><h3 data-start=\"6869\" data-end=\"6909\">Step 5: Save Data to a Safe Location<\/h3><ol data-start=\"6911\" data-end=\"7178\"><li data-start=\"6911\" data-end=\"6988\"><p data-start=\"6914\" data-end=\"6988\">Choose a different physical drive as the destination for recovered data.<\/p><\/li><li data-start=\"6989\" data-end=\"7069\"><p data-start=\"6992\" data-end=\"7069\">Start the recovery process and confirm that important files open correctly.<\/p><\/li><li data-start=\"7070\" data-end=\"7178\"><p data-start=\"7073\" data-end=\"7178\">Only after confirming backups should you attempt reinstalling or reformatting the original system disk.<\/p><\/li><\/ol><p data-start=\"7180\" data-end=\"7320\"><a href=\"https:\/\/www.amagicsoft.com\/\"><strong data-start=\"7180\" data-end=\"7208\">Amagicsoft Data Recovery<\/strong><\/a> operates in read-only mode on the source disk, which helps protect remaining data during scanning and export.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-298b7af e-flex e-con-boxed e-con e-parent\" data-id=\"298b7af\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-f53f8f3 e-con-full e-flex e-con e-child\" data-id=\"f53f8f3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-f51b45c e-con-full e-flex e-con e-child\" data-id=\"f51b45c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-0b2a461 e-con-full e-flex e-con e-child\" data-id=\"0b2a461\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-9d6838c e-con-full e-flex e-con e-child\" data-id=\"9d6838c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-48570fb elementor-widget__width-auto animated-fast elementor-align-center elementor-widget elementor-widget-elementskit-button\" data-id=\"48570fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;,&quot;_animation_delay&quot;:200}\" data-widget_type=\"elementskit-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\t\t<div class=\"ekit-btn-wraper\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/download.amagicsoft.com\/product\/mdr\/magic-data-recovery.exe\" class=\"elementskit-btn  whitespace--normal\" id=\"\">\n\t\t\t\t\tDownload Magic Data Recovery\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n        <\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0452ffa elementor-widget elementor-widget-text-editor\" data-id=\"0452ffa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\">Supports Windows 7\/8\/10\/11 and Windows Server<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1a4a7615 e-flex e-con-boxed e-con e-parent\" data-id=\"1a4a7615\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-79ba4308 elementor-widget elementor-widget-text-editor\" data-id=\"79ba4308\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2 data-start=\"7322\" data-end=\"7376\"><span style=\"letter-spacing: -1.08px; text-align: inherit;\">Best Practices to Prevent Future Boot Device Errors<\/span><\/h2><p data-start=\"7378\" data-end=\"7425\">To reduce the chance of future 0x7B episodes:<\/p><ul data-start=\"7427\" data-end=\"7836\"><li data-start=\"7427\" data-end=\"7510\"><p data-start=\"7429\" data-end=\"7510\">Maintain regular system images and file backups to external or network storage.<\/p><\/li><li data-start=\"7511\" data-end=\"7586\"><p data-start=\"7513\" data-end=\"7586\">Avoid changing SATA controller modes or RAID settings without planning.<\/p><\/li><li data-start=\"7587\" data-end=\"7662\"><p data-start=\"7589\" data-end=\"7662\">Update storage drivers and firmware only after verifying compatibility.<\/p><\/li><li data-start=\"7663\" data-end=\"7746\"><p data-start=\"7665\" data-end=\"7746\">Use reliable power protection to reduce sudden outages and write interruptions.<\/p><\/li><li data-start=\"7747\" data-end=\"7836\"><p data-start=\"7749\" data-end=\"7836\">Monitor disk health using SMART tools and replace drives showing early failure signs.<\/p><\/li><\/ul><p data-start=\"7838\" data-end=\"7886\">Supports Windows 7\/8\/10\/11 and Windows Server.<\/p><h2 data-start=\"7888\" data-end=\"7901\">Conclusion<\/h2><p data-start=\"7903\" data-end=\"8151\">\u201cInaccessible Boot Device\u201d indicates that Windows cannot read the system volume during boot, not that every file is lost.<br data-start=\"8024\" data-end=\"8027\" \/>By understanding how the boot chain works and separating repair from <a href=\"https:\/\/www.amagicsoft.com\/data-recovery\/crashed-os-recovery\">data recovery\u00a0from a crashed OS<\/a>, users can avoid unnecessary data loss.<\/p><p data-start=\"8153\" data-end=\"8486\">Advanced techniques such as BCD repair and offline registry edits can restore a bootable system.<br data-start=\"8249\" data-end=\"8252\" \/>When data is the highest priority, recovering files first with<a href=\"https:\/\/www.amagicsoft.com\/\"> <strong data-start=\"8315\" data-end=\"8343\">Amagicsoft Data Recovery<\/strong><\/a> is often the safest decision.<br data-start=\"8373\" data-end=\"8376\" \/>After data is secured, you can reinstall or repair Windows with confidence and rebuild a stable environment.<\/p><h2 data-start=\"8488\" data-end=\"8494\">\u00a0<span style=\"letter-spacing: -1.08px; text-align: inherit;\">FAQ<\/span><\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c844836 e-flex e-con-boxed e-con e-parent\" data-id=\"c844836\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-250fd08 faq-no-toc elementor-widget elementor-widget-elementskit-faq\" data-id=\"250fd08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"elementskit-faq.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\n                <div class=\"elementskit-single-faq elementor-repeater-item-17beb9f\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How do I fix an inaccessible boot device?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Start with simple checks. Reseat the drive cables, revert recent BIOS or SATA mode changes, and disconnect non-essential drives. Then boot into Windows Recovery Environment, run Startup Repair, and, if needed, use bootrec and chkdsk from Command Prompt. If errors persist, back up data with recovery software before reinstalling Windows.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-26e5842\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Why is my Asus laptop blue screen inaccessible boot device?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                On Asus laptops, this blue screen usually appears after driver updates, BIOS changes, or disk issues. A storage controller mode change, failed Windows update, or a degrading SSD\/HDD can break access to the boot volume. Use WinRE Startup Repair, check BIOS boot order and SATA mode, then evaluate the disk\u2019s health.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-b9ada31\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\"> Do you press F5 or F8 for Safe Mode?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                On older systems, F8 opens Advanced Boot Options and Safe Mode. On most modern UEFI systems, the F8 menu is disabled by default. Instead, interrupt boot three times or boot from installation media, then choose Troubleshoot &gt; Advanced options &gt; Startup Settings. In that menu, F4\/F5\/F6 select Safe Mode variants.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-a797c27\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Should I reinstall Windows to fix boot issues?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Reinstalling Windows is a last resort, not the first step. Always try repair options first: Startup Repair, System Restore, bootrec, and driver rollback. Before any reinstall, recover important data to another drive. A clean installation can fix persistent boot errors but will remove existing system configuration and installed applications.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-d661ef9\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How do I repair a Windows boot device?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Use a Windows installation USB and select Repair your computer. Run Startup Repair to automatically fix common problems. If that fails, open Command Prompt and use bootrec \/fixmbr, bootrec \/fixboot, and bootrec \/rebuildbcd. Then run chkdsk on the system partition. Always back up critical data before intensive repairs.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-6f2ec83\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How to fix \u201cThe boot selection failed because a required device is inaccessible\u201d?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                This message indicates Windows cannot reach the configured boot device. Boot from installation media, then repair the BCD with bootrec or bcdboot. Verify that the system partition is active (MBR) or correctly referenced in UEFI, and confirm the drive appears healthy. If the disk is failing, image or recover data first.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-f7323a9\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">What is the cause of no boot device?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                \u201cNo boot device\u201d means firmware cannot find a drive with valid boot code. Causes include disconnected or failed disks, incorrect boot order, corrupted MBR\/GPT, or missing EFI entries. It may also follow cloning or repartitioning. Check BIOS detection, cables, and diagnostics, then repair or recreate the bootloader if the disk is intact.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-6c7001e\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\"> How to fix stuck on boot screen?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                First, disconnect external USB devices and unnecessary drives. Enter BIOS to confirm the system disk is detected and correctly ordered. If the logo hangs, force shutdown and boot into Windows Recovery Environment. Use Startup Repair, then chkdsk and sfc \/scannow from Command Prompt. If hardware tests fail, suspect a failing drive.\n            <\/div>\n        <\/div>\n                                <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I fix an inaccessible boot device?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Start with simple checks. Reseat the drive cables, revert recent BIOS or SATA mode changes, and disconnect non-essential drives. Then boot into Windows Recovery Environment, run Startup Repair, and, if needed, use bootrec and chkdsk from Command Prompt. If errors persist, back up data with recovery software before reinstalling Windows.\"}},{\"@type\":\"Question\",\"name\":\"Why is my Asus laptop blue screen inaccessible boot device?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"On Asus laptops, this blue screen usually appears after driver updates, BIOS changes, or disk issues. 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Before any reinstall, recover important data to another drive. A clean installation can fix persistent boot errors but will remove existing system configuration and installed applications.\"}},{\"@type\":\"Question\",\"name\":\"How do I repair a Windows boot device?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use a Windows installation USB and select Repair your computer. Run Startup Repair to automatically fix common problems. If that fails, open Command Prompt and use bootrec \/fixmbr, bootrec \/fixboot, and bootrec \/rebuildbcd. Then run chkdsk on the system partition. Always back up critical data before intensive repairs.\"}},{\"@type\":\"Question\",\"name\":\"How to fix \u201cThe boot selection failed because a required device is inaccessible\u201d?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This message indicates Windows cannot reach the configured boot device. Boot from installation media, then repair the BCD with bootrec or bcdboot. Verify that the system partition is active (MBR) or correctly referenced in UEFI, and confirm the drive appears healthy. If the disk is failing, image or recover data first.\"}},{\"@type\":\"Question\",\"name\":\"What is the cause of no boot device?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"\u201cNo boot device\u201d means firmware cannot find a drive with valid boot code. Causes include disconnected or failed disks, incorrect boot order, corrupted MBR\/GPT, or missing EFI entries. It may also follow cloning or repartitioning. Check BIOS detection, cables, and diagnostics, then repair or recreate the bootloader if the disk is intact.\"}},{\"@type\":\"Question\",\"name\":\" How to fix stuck on boot screen?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"First, disconnect external USB devices and unnecessary drives. Enter BIOS to confirm the system disk is detected and correctly ordered. If the logo hangs, force shutdown and boot into Windows Recovery Environment. Use Startup Repair, then chkdsk and sfc \/scannow from Command Prompt. If hardware tests fail, suspect a failing drive.\\n\"}}]}<\/script>\n                \n    <\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Table of Contents Understanding the \u201cInaccessible Boot Device\u201d Error The \u201cInaccessible Boot Device\u201d error appears as a blue screen (BSOD) with stop code 0x0000007B.It means Windows cannot read the system volume during startup. This error usually does not mean the drive has instantly failed completely.Often, the problem is missing storage drivers, a damaged file system, [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":37245,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[725],"tags":[738],"class_list":["post-37239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wiki","tag-wiki"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Fix Inaccessible Boot Device (0x7B) in Windows | Amagicsoft<\/title>\n<meta name=\"description\" content=\"Learn what causes the Inaccessible Boot Device (0x7B) BSOD and how to fix it safely, recover data with Amagicsoft, and prevent future boot failures.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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