Hello, all. I've always bought my computers with the OEM version of the newest windows version already installed so this is my first time actually installing Windows myself. This question has been on my mind for a while, so I thought I'd ask it here. About two weeks ago I decided to upgrade from Windows Vista home premium 32 bit to Windows 7 on my Conpaq Presario. Because I didn't want to loose my files and programs and things and because it looked like the easiest option I did an in place upgrade from Vista Home Premium 32 bit to 7 Home Premium 32 bit. Windows 7 installed with no problems at all and I love it so far, but lately I've been kicking myself for passing up the opportunity to move up to 64 bit Windows. If at some point in the future I decide to switch to 64 bit Windows 7 will my product key still work if I'm installing it on the same computer, and wil I be able to activate Windows again?