I have had this problem pretty much for the entire life of my desktop that was built back in the December-January time frame. Whenever I boot up my computer it kicks me directly into the BIOS and says that there was a hang-up due to an incorrect CPU setting. Motherboard is an ASUS A7V600-x and my processor is an AMD Athlon 2500+. I have the clock speed set at 1833 Mhz, yet if I try and boot with this speed it gives me the error and I have to up it to 2200 Mhz. When I try and boot with the clock speed at 2200 Mhz it has the same error and will only boot up once I change the clock speed back to 1833 Mhz. Once in Windows, the computer will not restart, I tell it to restart yet it just seems to shut down Windows but is still running. A little background though, this motherboard was given to me by my older brother. He had run an AMD Athlon 3200+ on the same board but had overclocked it, so when I first installed my CPU the board had it overclocked and I had to down clock it. I am not quite sure how to go about resolving the problem, and neither are my father or brothers. Tips or suggestions?