Inaccessible boot device bsod Bug Check 0x7B


Generally, this error inaccessible boot device Bug Check 0x0000007B indicates that the OS has lost access to the system’s data or boot partitions during the startup. Or System cannot read the Windows partition on the hard drive it boots from.

There is various reason that can cause this inaccessible boot device BSOD Error on windows 10. It could be an HDD failure, Disk Drive Error, Driver conflicts between the hardware, Corrupted System files Or the Bootmgr File Get Corrupted While The Windows Upgrade process, or loosely connected data cables within the system and HDD etc.

Whenever you face This BSOD (Bug Check 0x0000007B) on your PC After a System restart windows start normally. But If this blue Screen Frequently occurring at startup Here apply solutions below to get rid of this inaccessible_boot_device Blue Screen Error.

Remove External Device

The first thing you must do completely remove any software or new hardware that you have installed recently. Also Remove all other removable devices (such as external HDD, printer, scanner etc ) exclude keyboard and mouse and Start windows normally to make sure any external device not causing the issue. If you notice after remove external devices windows started normally then find out the problematic device and check the same with other computer or compatibility issue.

Check BOOT order on BIOS Setup

Just Restart your System And enter the BIOS by pressing F2 repeatedly at the startup. F2 is the default for the most operating system, but if it doesn’t work for you then at the POST screen take a closer look to see which key is set to enter BIOS and then reboot again and use the appropriate key to get into BIOS.

Here go to main -> SATA Mode And Here select AHCI Mode instead of IDE from the list. Again Move To boot Tab and change Frist Boot As HDD. Press F10 To save changes on BIOS setup and Restart windows Check Started normally.

If your boot drive is not listed in your BIOS, it may have failed. Try another drive in its place to check cable/power/connector. If the other drive shows up, it’s probably drive failure. If it doesn’t show up, try a different IDE or SATA port, cable and power connector.

Perform Startup Repair

Access the Windows 10 Advanced Startup Options And click on Startup Repair To check And fix if any Missing/corrupt boot configuration settings or Corrupt registry settings causing the issue.

windows 10 advanced options

Fix Boot Components

After startup repair windows start normally without any BSOD error. If windows fail to start again from Advanced options click on command prompt And perform command below to

As discussed before the main reason behind this inaccessible boot device BSOD error is, OS has lost access to the system’s data or boot partitions during the startup. It may be because the master boot record (MBR) file, Boot configuration data (BCD) file missing or get corrupted which may be causing the issue.And running command below helps to deal this issue.

bootrec /fixmbr 
bootrec /fixboot
bootrec /rebuildbcd
bootrec /scanos

Boot into Safe mode with networking

Most of the time Repair master boot record (MBR) file and Boot configuration data (BCD) Fix the BSOD error and Windows start normally. But if still getting the same BSOD Then there may be corrupted, Outdated or incompatible display driver causes this inaccessible_boot_device windows 10 BSOD error. Also Some third-party applications, corrupted system files, Disk drive errors also cause this Blue screen error on windows 10, 8.1 and 7. That cause you need to boot into safe mode, Where windows start with minimum system requirements and allow you to perform troubleshooting steps. Read how to boot into safe mode on windows 10, 8.1.

Scan And Check Hard Disk For Errors

As discussed before disk drive failure also causes inaccessible boot device, or OS lost access to the system’s data or boot partitions during the startup. Running the CHKDKS command is very helpful which check the disk drive for errors and fix them if found any.

Run SFC and DISM command

Also Run the System files checker Utility which scan and restores if any corrupted, missing system file causing the issue. To do this open command prompt as administrator, Then type sfc /scannow and hit the enter key. This will start scanning process for missing, corrupted system files. If found any damages, missing system files the SFC utility automatically restore them from a compressed folder located on %WinDir%\System32\dllcache. Wait until 100% complete the scanning process, After that restart windows and check there is no more inaccessible boot device blue screen error.

If system file checker scanning results Windows Resource Protection found corrupt files but was unable to fix some of them, that cause you need to run the DISM tool which repairs the system image and allow sfc to do its job.

Still need help continue Reading…….



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