I wonder if anyone has overcome this. I installed Windows 7 home premium over xp pro. I used the clean install option. When I was done I didn't have any disc space left. I was under the impression that the install would clear out the old version and I would have a nice clean HD with just the OS. What I got was all my old files still there but unaccessible. SO I did it again and same result. Well now I'm over it and did a format to clear the past program and all the old files I wanted out in the first place. I rebooted to the install disc and proceeded to do the deed. After I loaded all my drivers and finally got everything together (pain in the a..) i went to activate and got the error telling me I did a clean install and the "Upgrade" I bought could not be used due to an old version not being on my disc when i did the install WTH ? Now I have a laptop with 22 days left on this "Trial Version" I paid $149 for and no xp disc to reinstall to fix this issue. I do have a ghost of the old HD image on an external HD. Can I just copy the windows folder over to the laptop HD and activate then delete that "windows folder" or is there an easier way?