I have been using W7 for a week with various gimicks to thwart the driver signing issue. Last night, I did a clean install and restored my applications from backup. In some cases (Office, Outlook, Power DVD) I had to re-install from the original media, but my settings and data were preserved from the backup. It's all good now: the DVD drive installed without problems. I did have to run my drivers/utilities disc to load the Co-processor and SM buss drivers for my nVidia based motherboard, but that was all. My PC is a Shuttle SN78SH7 Bare Bones machine with an AMD 8750 "Black Edition" 3 core, 2.4 Ghz CPU. With the multiplier set to 14.5 it is running at 2.9 Ghz with clocks and voltages on Auto. I am running two WD 250 GB SATA drives. All is well!