Ok, here's my problem; I bought a motherboard replacement off ebay because my old one's mouse port stopped working. It's an ASUS A7N266-VM/AA, the exact same version and revision as my old motherboard. Here's the confusing part-- I move my HDD, RAM, CPU, video card, cd rom, etc... over to the new one, and it takes like 20 minutes just to show the WinXP login screen! I can start it up in safe mode, but again it is quite slow, but not as slow as just normally starting it up. When I get to the desktop I ctrl+alt+del to show system performance, the CPU usage is at 100%, and when I go to processes, System use is at 97%. When I take everything back out and put it back into my old motherboard it works fine (except the mouse port, of course). It's not the BIOS. I moved the old BIOS chip into the new one to make sure of it, it shows the correct version information and I've set it to the settings I have on my old mobo. It's not any of the peripherals (keyboard, mouse, cd rom). It's not the operating system or the hard drive, I used an old hard drive and installed winxp onto that to see if it was a driver problem or something; it's not. Any ideas?