I've been having a lot of issues with my computer, and I'm not sure what's causing it. It was originally a Gateway, but I've upgraded many of the components since I bought it a couple years ago. Here's the problem: The monitor will lose signal as though the computer has turned off. The tower itself still has the power button lit, but doesn't respond to anything. The CDRW drive light turns solid green, none of the drives will open. The only way out at this point is to hold down the power button for 3-5 seconds to turn it off. I have to wait several minutes before I can turn it back on; otherwise, the fans start going, the power button lights, and the CDRW drive light is on again. If I let it sit for a few minutes it will usually boot up like normal. This seems to happen primarily when burning a DVD or playing a game, but it's happened a few times for no apparent reason (turning off screensaver, opening a document or smaller program, etc). I've downloaded EVEREST home edition, and the temperatures look fine (range from 40-50 C). The CPU fan is running normally (between 5500-5600 RPM). It's a little noisier than it used to be, but since the temps aren't going high (even right before a crash) I tend to doubt that's the problem. I know my memory is pitiful, and my CPU is junk, but I don't know if either of them would cause such issues. I can't really afford to upgrade everything to troubleshoot it, so I thought I would post here first to see if anyone else knows what it could be.