OK Guys, this is a long shot but I thought I would give it a try. I recently thought I would challenge myself and build my own PC rather than buy an already assembled machine. I bought all the parts, put them together fairly easily, initially I had some problems with the way I had the Hard/CD drive and the jumper settings configured, but you guys sorted that out for me. My problem at the moment is, my machine randomly keeps dying. I boot up, can be working for an hour and then I lose power, everything shuts down, no warning - nothing - its like someone pulling the plug. If I press the power switch the machine will reboot with no problems but I will only have power for about 2/3 mins and then same again, the machine will die. I could do this ten time with the same results, I would never get more than a few minutes of life in the machine after the first initial dying Now for the strange part !! The machine is a tower unit, and it sits in the normal tower position, under my desk. Once the problem occurs, and, as I say, its is totally random, it can happen after an hour, after 6 hours or after 5 minutes. However If I put the machine flat on the floor, i.e. flat on its side not in the normal tower position, the problem will never happen, so that leads me to think maybe something is not quite with the way I have put the thing together. This problem has been occuring from day 1 of the machines life., so any help to help me fix it would be greatly appreciated, as its pretty frustrating at the moment.