Hello guy and gals, I've been trying to diagnose this problem with the help of a few friends and we're out of ideas at this point. The computer in question is a home built PC the worked fine for two years before this problem occurred,I'm told the problem first started when it got a virus but I don't know for sure. The PC has an Asus P5N32-E SLI MB and it's running Vista Home Premium 32-Bit. When I start the computer it loads to the bios splash screen and normally freezes there, occasionally I'm able to get into the bios before it freezes where I can see that all of the temps are normal and nothing jumps out as unusual, however I only have about 20 seconds to look through it before it freezes. Before this started it would just just keep rebooting when it got to the post screen with occasional distortion of the bios splash screen. I have tried replacing the hard drive with a known working one, and I have replaced the video card with a known working one; I have also pulled all of the ram out of the computer and tried each stick individually without success. I have pulled the battery several times and cleared the capacitors and so far I have gotten nowhere. Any ideas are greatly appreciated, thank you in advance for your help.