my family has an older gateway computer. It has a 600Mhz AMD processor, and 192 megs of ram. A while back the harddrive broke(made this clicking noise when we turned it on) so we bought another HD and intalled everything fine, and it all worked great except for when we booted up it would hang on the message Checking NVRAM message before windows booted, but if we turned it off then on again it would boot fine. This being annoying, I searched around and found that people with the same problem reset their cmos to fix this, so i went ahead and did the same, except now when windows boots, the system locks up (including keyboard etc) at the windows logo screen. I can, however boot up into safe mode.