Today I've been trying to upgrade my Windows 7 Home Premium 64 bit laptop to 7 Pro (as I eventually want to upgrade to 8 pro)
Have a legit copy of windows 7 pro from dreamspark and thought it would upgrade no problem, when I booted from usb and after the first few setup options I got this message "To upgrade from one edition of Windows 7 to another edition of Windows 7, use Windows Anytime Upgrade. Cancel the upgrade, open the Start menu, and search for Windows Anytime Upgrade"
When I try this I get to choose between purchasing an upgrade online or entering my upgrade key, I don't have an upgrade key, I have a normal product key that came with my win7pro download, so when I enter this it says it's invalid. What else can I do?