I don't know if this is in the right category but I'm not sure what is causing my problem anymore. I have a PC "running" on a gigabyte am2+ mobo with an athlon II 2400, using windows 7. Everything will run very well and fast for a couple minutes. It then will completely freeze. It doesn't blue screen or anything but the mouse and keyboard don't respond and anything on the display stops. O read on another forum it could be bad hard drives. So I replaced them to no avail. So then I put hw monitor on a flash drive. Booted it up and managed to get it open before it locked up. I notice the CPU was running at 100% just on the home screen. So I figured it was my cpu. I replaced it with an athlon II 2450. And I have the same issue. The only thing I think it could be is the motherboard. The ram is new and I highly doubt the video card is the problem. Any ideas or help would be appreciated. Also sorry for the long post, I could think of a shorter way to describe my problem.