Windows automatically shuts down

[Caroline]

1) A problem has been detected and windows has shutdown
to prevent damage to your computer.

2) UNMOUNTABLE_BOOT_VOLUME

3) Technical Information
STOP: 0X000000ED (0X8235E948, 0X00000000, 0X00000000)

 

[Will Denny]

Hi

See if the following link helps - scroll down the left hand column:

http://aumha.org/win5/kbestop.htm

 

[Mary Sauer]

"STOP 0x000000ED UNMOUNTABLE_BOOT_VOLUME" Error Message When You Restart Your
Computer or Upgrade to Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;297185&Product=winxp

Do you have the Windows service pack 1?
If the below article describes your issue, it was fixed in the first service pack
Stop 0x000000ED Error Message When Volume on IDE Drive with Caching Enabled Is
Mounted
http://support.microsoft.com/default.aspx?scid=kb;en-us;315403&Product=winxp