My computer keeps shutting ..

I took it to staples and the person there had it working, but when I brought it home, it started acting up again. She thinks it is a software problem. She suggested I do a restore and I have tried to do a restore to specific dates and it won't allow the restore to happen. I was using my son's CPU while mine was at Staples and this didn't happen with his (I thought it might be the power in the house at first). Any suggestions?

The CPU fan may be going out - when a computer overheats - it shuts down - it's a safety feature, keeps you from losing the entire system.

Yeah, sounds like an overheating thing to me unless you are getting some kind of software error before it shuts down.

It may be the power supply...or maybe it's over heating. Once the processor gets too hot, it shuts down. I suggest u get the power supply checked out.

I had that happen to my old computer, and mine was due to over heating. Go to your local computer store, not a industrial one but a local one, and have them check it out and put in some additional fans.