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Published on 02.02.10 by Brent Trahan

Troubleshooting a Stop 0x7B or INACCESSIBLE_BOOT_DEVICE

Learn how to troubleshoot the Stop 0x7B or INACCESSIBLE_BOOT_DEVICE Stop Error (BSOD) in Windows 7.

What caused the error?

The Stop 0x7B Message indicates that Windows has lost access to the system partition or boot volume during startup.  Installing or upgrading incorrect hard drive drivers are the typical cause of the problem.  This error can also be cause by a virus infection.

How do I fix it?

  • Make sure the disk controller is working.
  • Repartitioning disks, adding new disks, or upgrading to a new disk controller might cause information in the Windows Boot Manager or boot configuration data file to become outdated.  If this error occurred after you changed something with the hard drive, edit the boot configuration data file or adjust the Windows Boot Manager parameters to allow the system to start.
  • Make sure the system firmware and disk controller BIOS settings are correct and that the hard drive was properly installed.
  • Check the hard drive for errors using check disk.
  • Scan the computer for malware.

Still need help? Ask your computer question now.

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