Boot windows XP os cd, select the option R for recovery console.
Now it will ask you to select the OS you want to login to fix it... select 1 and hit enter.
Now it will ask admin password, if you have any enter that and proceed.
Now you will be in a familiar DOS prompt: c:\Windows\>
Here type in chkdsk \p - its a quick fix.
chkdsk \r - prolonged fix,
if you have more than one partition, have it run on them also.
Then type in fixboot and hit enter. It will ask you top create a new boot info, type in Y to proceed and hit enter.
If you are having an OEM OS - from HP/DELL/Acer/Sony etc then do not do FIXBOOT, this wipes out the Image restore or the recovery option.
Now exit, restarts the computer.
You should be back on, if you still have the BSOD - 0x000000ED - Unmountable_Boot_Volume, contact your tech support or admin, the HDD is gone bad and cannot be fixed. Need to replace the HDD
All the best
Edited by ThePowerDivine, 04 September 2008 - 01:40 AM.