Windows activation with planned reinstall
I have a windows 7 intallation that I got from MSDN. The thing is that I want to format my PC and reinstall windows 7.
At first I thought I just have to write the current key somewhere, reinstall windows 7 normally and then activate it with my old key, but a friend did this and on the last step the activation wouldn't work because it said that the key was in use.
What can I do?