My situation basically goes like this: I used a friend's copy of XP to put on my computer. When I tried to enter the validation code, I wasn't able to. So I was able to use it for 30 days until it expired. I then used the Windows 7 upgrade and now no longer have the expiried XP. So, since I didn't actually reformat my hardrive and install Windows 7 (I just did the upgrade), will my version of Windows 7 be a valid copy since my XP was not. Thanks for the help.