That's exactly what I had to do. I booted up with the Win7 DVD (and decided to go for the 64-bit version since I was doing a clean install). The installation went fine, but I had some updating to do...such as getting updated drivers for 64-bit (e.g., for my blu-ray). Plus, the big deal has been to reload programs. Fortunately, I had an external drive that backed-up my documents, so I have all my photos, movies, etc...but, I cannot find my Outlook.pst file anywhere. So I think I may have lost all my emails and contacts (but, I'm still hunting for the file). Thanks.