Running Windows 7 Professional SP-1 32-bit on a home-built system which uses an Asus P8H67-M PRO/CSM (REV 3.0) Socket 1155 motherboard. After inserting a PCIe USB controller card, the system would not boot, and "No Device!" appeared during POST. Thinking I may have loosened a connection while installing the controller card, I tested the IDE cable and power connections to the system hard drive (A Western Digital WD 3200JB IDE disc), and then the system started to boot, but never got to the boot loader screen. In BIOS, the WD 3200 was recognized, but it was no longer an option which could be selected in the boot priority. I am able to load Windows if I select that hard disc in the "Boot Over-ride" section of the BIOS. It's a mystery to me, how the drive can appear, and be bootable with boot over-ride, but not be selectable in the boot priority menu. Can you advise me how to resolve this?