How to change Windows 8 product key

The way where in Windows 7 you could change your product key is not working anymore.

Instead, you need to use command line to change your product key in Windows 8:

open cmd.exe as Administrator (go to the start metro screen and search for cmd, then right click on cmd and in the bottom select Run as Administrator)

then type following:

slmgr.vbs -ipk PUT-YOUR-KEY-HERE

then, you should have your new key set properly. You can go ahead and try activation then.

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