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Troubleshoot Unmountable Boot Volume


You start up Windows XP and receive the following error message, where aaaaaaaa, bbbbbbbb, cccccccc, and dddddddd are hexadecimal numbers that may vary:

STOP 0x000000ED (0xaaaaaaaa,0xbbbbbbbb,0xcccccccc,0xdddddddd) UNMOUNTABLE_BOOT_VOLUME


This behaviour can occur when the file system is damaged and cannot be mounted. More commonly it is due to a corruption in the BOOT.INI file.


Microsoft includes a disk utility CHKDSK that detects and repairs any minor system corruption. To do this, use the following steps:

  • Enter Windows Recovery Console
  • At the command prompt, type: chkdsk /r
  • Hit Enter
  • When the repairing process completes, type: exit
  • Restart your computer