XP boot error

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Hi all-

I have an HP laptop that will not start. After powering up, the machine goes 
to the Windows XP splashscreen, then immediately bluescreens with a brief 
error message that says "unmountable boot volume". I have tried the HP 
recovery disc, a fresh install of Win 2K, and other bootdisks without any 
success.

Any help is appreciated before the laptop goes into the trash!

Thanks!