How to Fix Bug Check 0x7B: INACCESSIBLE_BOOT_DEVICE
The INACCESSIBLE_BOOT_DEVICE bug check has a value of 0x0000007B. This bug check indicates that the Microsoft Windows operating system has lost access to the system partition during startup.
If the PC suddenly loses access to the system partition during startup, then the “0x0000007b” error screen is displayed and the boot process is halted.
Repair Boot Sector
Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.
Please type below commands into Command Prompt and press Enter key.
Following commands will repair Master Boot Record (MBR), Boot Sector and BCD Store.
Check your disk with CHKDSK utility
Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.
Please type below command into Command Prompt and press Enter key.
Following command will fixes errors on the disk and locates bad sectors and recovers readable information.
Please replace partition letter D: with Windows installed partition letter. When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.
Repair corrupted system files with the SFC command
Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.
Please type below command into Command Prompt and press Enter key.
The following command scans integrity of all protected Windows system files and repairs files with problems when possible.
Please replace partition letter D: with Windows installed partition letter. When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.
If the PC suddenly loses access to the system partition during startup, then the “0x0000007b” error screen is displayed and the boot process is halted.
- Make sure Windows OS installed hard drive connected correctly.
- Make sure Windows OS installed hard drive first boot device from within BIOS Setup Utility.
Repair Boot Sector
Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.
Please type below commands into Command Prompt and press Enter key.
Following commands will repair Master Boot Record (MBR), Boot Sector and BCD Store.
Code:
Bootrec /FixMbr
Bootrec /FixBoot
Bootrec /RebuildBcd
Check your disk with CHKDSK utility
Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.
Please type below command into Command Prompt and press Enter key.
Following command will fixes errors on the disk and locates bad sectors and recovers readable information.
Code:
Chkdsk D: /rPlease replace partition letter D: with Windows installed partition letter. When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.
Repair corrupted system files with the SFC command
Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.
Please type below command into Command Prompt and press Enter key.
The following command scans integrity of all protected Windows system files and repairs files with problems when possible.
Code:
Sfc /Scannow /OFFBOOTDIR=D:\ /OFFWINDIR=D:\WindowsPlease replace partition letter D: with Windows installed partition letter. When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.