Currently Being ModeratedApr 24, 2013 6:49 PM (in response to Iceberg)
The likelihood of it being a virus are minimal in my experience. You could try Intego's VirusBarrier, or BitDefender for Mac.
That said, there's likely usually something else going on. Have you checked how much free hard disk space you have? If you're down to 1GB or less, usable, that's going to muck things up considerably. That's one of the most common things. Also, having a significant amount of cache on your system. Clearing that out, at least once a year is a good thing.
Currently Being ModeratedApr 24, 2013 11:36 PM (in response to Linc Davis)
Surprised you just didn't say to take it to the store?
@iceberg - what are the symtoms of the restart? i.e. does it randomly just shut down (or restart) or does it happen after you do certain steps?