I built a new "green" media pc (low power consumption, etc.) and wanted to use an old WD Green 750Gb hard drive. I nuked the hd with dburn, but I can't get Win 7 oem to install. The nuke seemed to go just fine, and win 7 starts to install but then it complains about a USB drive or some other drive that isn't there. There's just the WD hd and my DVD drive... Am I missing something here? I figured Win 7 would format and partition during installation process...?! What to do next?