I'm stymied by a strange problem. My desktop unit will not play a DVD without either freezing up the mouse and keyboard (if I'm lucky) or restarting the computer altogether. Running Win 7, dual-core AMD 4600, 3 gb RAM, Win 7 Pro. Pretty basic unit. Had to replace my DVD burner about 2 years ago. Don't use it much, so the problem may have been lurking around without my knowledge before. But recently, I got a DVD that had some data files on it for a court case in which I'm involved, and when i put it in the computer DVD drive, the machine just restarted. And when it got to the login screen and I typed in my password, it restarted AGAIN. It won't get fully loaded with the DVD in it--doesn't matter what the disk is, either (I've tried this with about a dozen different CD's and DVD's) So, cleverly, I waited until it was all up and running, stuck in a CD and it froze the mouse and keyboard TIGHT. No warning, no sounds, just . . . nothing. Had to hit reset switch. Replaced the DVD burner--didn't matter. Replaced the SATA cable. No luck. Checked out various tech sites (Tom's Hardware, etc.) and no success. Any ideas would be VERY welcome. Incidentally, I did check the IRQ's for a possible conflict (which didn't show one) and the event viewer doesn't say anything except that the last shutdown was unexpected. I wasn't sure about the title to this question, but it's probably as accurate as i can come up with. FWIW, I do have an old IDE CD on the machine as well, and it works just fine.