Farm of the bu dow computer itself

I have a computer windows vista service poack 2, processor intel core 2 duo, the 400Go. Last month the computer unexpectedly stops by itself. I can't find the reason to do it.  There are 5 yr old door of entry.  Can someone help me with this or plan a few sugestons?

Thank you

It doesn't stop at the precise moment or at random times?

Run a full system scan with:

http://www.Microsoft.com/security/scanner/en-us/default.aspx

Check the event viewer and see what was said during the time of the problem?

Run these tools:

http://support.Microsoft.com/mats/windows_security_diagnostic/

http://support.Microsoft.com/mats/Malware_Prevention/

Tags: Windows

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