The file is possibly corrupt. The file header checksum does not match the computed checksum Every so ofter on boot up I get this error. A simple press of the reset button will reboot and start Win7 normally. It's an older main board ECS k7SEM New Harddrive New Memory New Dvdrw drive. Nothing seem to be corrupted from what I can tell. Ive ran a checkdisk, good. Ran Memtest, Good.. Only other Thing I could thing about would be the CMOS battery. would this cause the error?