If you have XP windows and its running slow or shutting down, try turning off all background programs that may be trying to update themselves on the internet. The only program that I have left running is my virus program. this worked for me. im a XP user. it now runs fast and with out problems. You can advise your computer when to update the windows programs and not assume you want them downloading in the background.

PHOENIX999
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Also...i think the support section first sticky says all of this...