Some time ago I bought a laptop with Windows 7 Home Edition x64 preinstalled. After that I have installed Ubuntu on the second partition. Year later I decided to wipe the whole Windows partition, and reinstall it, so I formated it.
For some reason recovery partition, installed by manufactor, wasn't working, so I downloaded OEM image of Windows 7 Home x64, intalled it, and entered product number, printed on my laptop .
After a few days I received "W7 Home Premium product key you typed is invalid for activation". Can I fix the situation somehow? I don't want to buy Windows once again - I already bought it with my laptop.