Ok, I installed a new PSU (Thermaltake tr2) and a new cpu (fx6300) into my msi 990xa-gd55, replacing a stock PSU and athalon ii x4 645. I did the swap, started up without resetting the cmos (I know, I'm in the future too guys) , and entered the bios setup, which showed the fx 6300 at the top of the screen. Attempted to start windows, rebooted at "starting windows" . . I swapped back to the athalon, reset cmos, went into boot setup, it showed the athalon at the top of the screen, and attempted to start windows, again to no avail. Attempted repair windows, no luck, and now I'm here.