I just built an 3800+ and M2n-SLI deluxe system. Everything seems to work fine so far. I can get it to post, access the BIOS, etc. However when I run the Windows setup and it gets to the point where I can install/repair Windows, my keyboard/mouse lose power. I've tried a PS2 adaptor on the keyboard and that didn't help. I've also verified that USB is enabled in the BIOS. The keyboard works fine in the BIOS / options screens, but not in Windows setup. Any ideas?