After swapping out the old motherboard on my son's rig with a bargain ECS kt600, the machine will not boot to windows. It goes through post fine and then goes to the "We're sorry, Windows did not load properly..." try safe mode. Will not boot into safe mode. I tried replacing the DDR266 ram with a stick of ddr400, no change. I tried enabling alternate boot devices and attaching another hard drive that had an OS on it. it wll not boot to either hard drive (although they are both recognized during POST) nor will it boot from the xp cd in the cd drive. I also tried disabling raid in the bios but still no luck. I'm guessing I'm missing something in the bios.. any ideas? Oh yeah, cpu is 2200 sempron at 39c.