Installing Windows 7: I found threads on this problem under other OSes Like Vista (shocker). The error message is "A required Cd/DVD drive device driver is missing. If you have a driver flopply disk, CD, DVD, or usb flash drive, please insert now. Now this is after I booted from a bootable install disk I created from an image I downloaded from Microsoft. I am actually in stalling Windows 7 RC. Solution: Re burned on a higher quality disk using the following burn settings. ISO 9660, NO JOLIET UDF 1.50. I also burned at a slow 4x speed to ensure quality. Now any one of these setting could have caused the problem. My best guess is the Joliet setting. I hope this saves you many hours like it did me. Burned with Ashampoo burning software.