PC slow for no apparent reason

Hi,

I realize my laptop is not homebuilt but I need expertise...

I am completely clueless here. My laptop has slowed to a crawl for no
apparent reason. It's as if the CPU itself has slowed, or acting like
it is starved for physical memory. The slowness is not on the OS
software level. Linux and XP are both slow. Booting is slow, bios
flashing is slow everything no matter what crawls. Video is slow.

I have a fast machine with 3gig memory.

What could cause everything to slow?
My HD checks OK on tests I've tried...I thought maybe the HD is on
it's way out. But there's not noise or excessive cranking.

What could it be?

Tried a reformat and reinstall. Reinstall was slow - took hours were
is usually takes about 1/2 hr...

Lee g.
.

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