I'm having a huge problem with my system freezing everytime I get to the desktop screen. I'm not sure what the problem is. In other posts I've read about power supplies, but I have an antec 430w, and up until a few days ago I wasn't really having much of a freezing problem. In other threads I've read about RAM. But on bootup it says "1024 bytes ok.......NVRAM ok........operating freq. 400hz" so I'm assuming my ram is ok, although I'm not sure what NVRAM is. Does anyone have a similar problem or suggestion???