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Published on 09.16.08 by Brent Trahan


How-to troubleshoot the Stop Message: Stop 0x7B or INACCESSIBLE BOOT DEVICE.

A Stop 0x7B indicates that Windows Vista has lost access to system partition or boot volume during the startup process. Installing incorrect drivers when installing or upgrading storage adapter hardware typically causes Stop 0x7B messages. Virus activity can also cause Stop 0x7B messages.

Resolving the Problem

Before you can fix this problem you need to figure out what caused it. Did you recently install new software or hardware? This will help out a lot when troubleshooting the problem.

  1. Check the hard drive’s driver. Try booting your computer at its last known good configuration.
  2. Repartitioning, adding new, or upgrading hard drives might cause information in the Windows Boot Manager to become outdated. Try repairing Windows Vista.
  3. Verify that system firmware (motherboard BIOS) or disk controller BIOS settings are correct. If you recently installed a hard drive, make sure it’s installed correctly.
  4. If the error occurs during Windows Vista setup, the problem might be caused by unsupported hard disk controller hardware. If this is the case you’ll have to provide hard disk controller drivers during the Windows Vista setup.

Still need help? Ask your computer question now.

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