Solutions to how you can fix your system when the boot volume is unmountable

BIOS / Boot Up Problems

BIOS Display Error Master Boot Record Corruption Windows Blue Screen Dump
Blank Screen At Start Up Unmountable Boot Volume Windows Failed To Load Due To Missing Files
CMOS Checksum Error Missing NTLDR Invalid Partition Table
Invalid Boot.ini or HAL.dll Windows Boot Up Errors    

Related Topics

Hard Disk / Chkdsk Problems Windows Problems


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:

  1. Enter Windows Recovery Console
  2. At the command prompt, type: chkdsk /r
  3. Hit Enter
  4. When the repairing process completes, type: exit
  5. Restart your computer

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