Got the wrong version installed. Need to install correct version

[kjsoccerdude]

So I bought what I thought what the full version of Windows 7 Pro online for the student discount for $65. I got it all installed and the activation key wouldn't work.

Long story short I got the upgrade version on accident. So I got that refunded and I'm about to just go buy Home Premium. I need to install it. Do I need to uninstall Pro before I install Home Premium? Or will it just get rid of it for me when I install it?

 

[whs]

No need to uninstall. The new installer will clear the disk.

 

[gregrocker]

Do you have any retail copy of XP or Vista that can qualify you to use Upgrade version - it doesn't even need to be on the drive?

Just use the workaround given here to activate Pro if no qualifying XP or Vista is present: Clean Install with a Upgrade Windows 7 Version