This problem has me stumped... processor usage slowly dwindles and then pc locks up.

Tengis

Tengis

Supreme [H]ardness
Joined
Jun 11, 2003
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Randomly the processor usage on this Toshiba laptop with WindowsXP Pro will slowly dwindle down to 0% and eventually just lock up. Memory usage remains the same for the most part.

I started up Prime95 to stress everything in Windows... 10 minutes goes by and all processor usage falls to 0%. Task Manager is open and remains the only "clickable" Window after everything drops to 0%. Eventually after about another 5 minutes the Task Manager window is no longer clickable and able to be manipulated but the mouse will still move around. Another 5 minutes goes by and the mouse freezes.

Thoughts?

-Only minimal Windows processes are starting up. Computer will eventually do this in safe mode as well.
-Windows is fully updated.
-Computer is completely clean of any type of malware/spyware/virus as far as I can tell.
-Ive ran multiple non-Windows based tests/stress tests on the cpu, memory, and hard drive to rule those out and they go all night.
-Not a heat issue - temperatures are fine. I also opened it up and cleaned out the heatsink just to be sure.
 
Ya, I ran memtest. I actually replaced the memory as well. I ran a couple HDD programs that are on the UltimateBootDisk but they didnt report any errors.
 
Have a new update... it froze almost immediately this time and let out a constant beep. Has done this twice now actually. There are no obvious errors anywhere. Might just suck it up and reinstall it even though thats not ideal right now.
 
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What is a good free program to check out the hard drive? Ive tried a couple but none are reporting errors.
 
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