Hardware monitor required.

I have a workstation running windows xp pro, that is freezing out of the blue with no errors reported at the event viewer, it just freezes no blue screen on anything. I have ran a memory check, OK, checked the speed of the fan and temperature of the processor it was also OK, now I have no idea on how to find the problem. I was thinking of a hardware monitor software does someone have a idea?

Thanks a lot
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1) Update and scan with your antivirus solution,
2) Download, install and scan with http://www.spybot.com to look for malware.
3) Boot in safe mode, does it happen then too?
4) Download and use CClean ( http://www.ccleaner.com/download ), to clean the registry. There can be a lot of stuff there causing problems.
If that does not help, you can try using combofix:
jdffAuthor Commented:
I already have scanned the computer for spyware and virus, this computer is free of spyware, I can post the hijackthis log in here.

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Also, to check any operating system corruption problems, use this command:
sfc /scannow

Does it happen in safe mode as well?
jdffAuthor Commented:
not sure will try it.

There should be a dump of the state of your system at the time it crashes.
The dumps are normally located in c:\windows\minidump\    
or  %systemroot%\minidump\

As you cannot reach Windows, see if you can turn off the 'Automatic reboot on error' option by selecting the Advanced Options Menu at bootup.  Keep press/releasing the F8 function key and you'll reach the menu where you can select the option "Disable Automatic restart on system failure".

If you can reach a Minidump(s), can you paste it in the "Attach Code Snippet" box and one of us can hopefully pinpoint the cause.

If there's no available dump it's possible that Windows is not seeing the problem due to a faulty PSU.   It could  also be due to the CPU requiring new thermal paste.

Although you checked memory, and ~if~ the machine has more than one RAM stick, you could try removing all but one stick & see if there's an improvement.
If there's only one stick & the problem is not resolved, i would be inclined to replace the RAM even though it tested ok.
Run it with a different OS, such as Knoppix http://www.knopper.net/knoppix/index-en.html. If it works without problems, your hardware is ok and the problem could be a Windows driver, corrupt file system or something in the startup.  Also, remove all network devices and USB connections, since they can cause lockups at random times.

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