I have a Dell Inspiron desktop at work that has worked perfect 24/7 since i got it. Monday when I came into work the computer was off. I didn't think much about it. I came in this morning and the computer was off again. It seems to be going off at night for some reason. Anyone got any suggestions that I can check out to trace down the problem? i.e. any software I can run on it to see if there is a problem? I know the first suspect would be the PSU, but aside from that? Anyway to tell what is just shutting it down?