I have been having problems with my computer freezing up. It usually happens about 1 minute after turning on the computer....it doesn't matter where it's at in the loading process. It can happen before or after Windows has started. A little about the computer....it is a PENTIUM 4 2.4GHz system. ECSP4VXASD2 Deluxe motherboard. It has Window XP, an Nvidia GeForce graphics card (it's not the original...I have replaced it) and I just replaced the 512 mb ddr memory with 2 gb, thinking that was the problem and it's still freezing. It also has a fairly new hard drive in it too (maybe a couple of years old)It freezes before I can get anything done. Everything freezes, the mouse, the keyboard. It's very annoying, I can't get in to check anything out. Any help you can give would be great.