I'm working on a friends computer that experienced this.
This error: UNMOUNTABLE_BOOT_VOLUME, implies a "Damaged
File System". If the second parameter (0xbbbbbbbb) of the
Stop error is 0xC0000032, then the file system is damaged.
If this is the case, restart the computer to the Recovery
CConsole, and then use the chkdsk /r command to repair the
volume. After you repair the volume, check your hardware
to isolate the cause of the file system damage. To do
this, use the following steps:
1. Start your computer with the Windows startup disks, or
with the Windows CD-ROM if your computer can start from
the CD-ROM drive.
2. When the Welcome to Setup screen appears, press R to
select the repair option.
3. If you have a dual-boot or multiple-boot computer,
select the Windows installation that you want to access
from the Recovery Console.
4. Type the administrator password when you are prompted
to do so.
NOTE: If no administrator password exists, press ENTER.
5. At the command prompt, on the drive where Windows is
installed, type chkdsk /r, and then press ENTER.
6. At the command prompt, type exit, and then press ENTER
to restart your computer.For additional information about
how to use the Recovery Console in Windows XP, click the
article number below to view the article in the Microsoft
Knowledge Base: 314058 Description of the Windows XP
Recovery Console - If this procedure does not work, repeat
it and use the fixboot command in step 5 instead of the
chkdsk /r command.
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