Ok, guys, I have recently built a new computer (specs in signature). I have everything plugged minus my 160 gig external HD which I currently am letting a friend burrow (which I'm worried will do the same thing) and my Ipod touch first generation is unplugged. I went to plug it into the back of my system via USB next to my keyboard I also tried my mouse USB, and the system all of a sudden just shuts down. It seems like it is a hardware shut down, as it just completely locks out, and I have to disconnect power from the mobo to be able to start it again. Now I went through all this, and decided to attempt the front connections, and everything worked fine. So I was curious to see if the USB's were bad, so I took out my digital camera and connected it to my computer via USB. The system did not shut down or anything, it operated normally. Any idea what i could do to fix the problem, or idea what is wrong?