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Upgrade from windows 7 home premium to professional from disc
Hi guys,
I currently have windows 7 home premium 64 bit edition on my desktop. I get a copy of windows 7 professional 64 bit disc with legal key from my university for a student special. How can I upgrade? I was redirected to windows anytime upgrade during the installation. But my windows 7 professional x64 product key was not accepted there. I already have lots applications installed so I don't want to do a clean install. Any suggestion? Thanks!