I formatted my HD in the spring for Windows 7 Beta (No Issues). Three months ago, I formatted again and installed 7RC (again, no issues). Today however, the following happened: After the computer rebooted to finish the installation, it rebooted once more (as normal to get into Windows) and then for a brief moment on the screen gave me an option to dual boot from Windows 7 or Windows 7. I had no time to react to stop the countdown, and it chose the top one. I am guessing the above is what's causing the computer not to see my slave drives and DVD-Rom Drive. I have no idea why it would show a dual boot since I formatted the HD for Windows, and I have never Dual booted on the computer ever. I went into the BIOS, and it only shows the Master Drive. I went into Drive Management, and only Drives C:\ and Y:\ (same HDD, just partitioned) are the only ones being seen. I hit "Refresh", but no luck. I shutdown my computer and checked to make sure the cords were in tight (which shouldn't matter since EVERYTHING was being seen on Windows 7 Beta and RC), but still nothing. I looked for ways online on how to access the dual boot screen, but it will not show again.