Crashing

[nlamont]

I folks, My computer is only a year and a half old but i'm having lots of problems. It randomly blue screens and restarts, what i'm doing at the time has no effect. I don't even have to be doing anything, i've walked away, came back in an hour or so and it has restarted itself. I had someone have a look at it a while back and they put in new RAM as that was the problem they said, doesn't seem so! Thanks ahead of time for anything you can give me!