I had the same issue, finally got in and got windows 7 put on the system. When I shut it down it started doing it again. Did you find a fix for this yet jstorm? I've already RMA'd my board but I hope the next one doesn't give me the same problem. Oddly the only way I got in to bios was by unplugging the power, plugging back in, hitting cmos reset, and restarted with the go button. This let me install windows and restart the computer many times, but when I completely shut down it came back 😞