Computer Goes to Sleep - Refuses to Wake My work computer is an eMachine running Windows XP Professional, with a dual 1.7 GHz Celetron CPU and 384 MB of RAM. We recently boght a new Gem GM-1701B plug-and-play monitor and added some VRAM to the computer. Everything was working great up until about two weeks ago, when the computer developed a tendency to go into sleep or hibernation mode, and then refuse to wake up. The only way to get back to using the computer is to do a forced shut down from the power button and then reboot. This happens despite my setting all power options to "Always On" and turning hibernation off. In addition, there seems to be no pattern to when this happens. Sometimes it goes to sleep literally one minute - or even less - after I've booted the computer; other times it stays on for as long as an hour. It doesn't seem to be a "sleep" proper thing anyway, as it switches off sometimes when I'm playing CDs or opening an application. Aside from this problem, the computer and monitor run fine and give no hint that anything is wrong until it's too late. If anyone has an idea as to what is causing this problem and can offer a solution, I'd greatly appreciate it. Thanks!