Solve : XP computer randomly turning off.?

1.	Solve : XP computer randomly turning off.?
Answer» I have a rather old computer and it is running windows xp. My computer will randomly just shut down (goes into a kind of standby MOOD, where the screen goes off and I can't do anything) this happens when I am just BROWSING the internet or OCCASIONALLY when I PLUG something into the USB ports. I this an over heating problem? software problem or a power supply problem? Thank you.Need to KNOW if it's actually standby, the screen going into power saver mode, or really a shutdown. 1) Check settings in power options 2) Boot to safe mode and see what happens

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