Windows Vista & Windows 7: Removal of the Product Key and Activation using the Command Prompt

Press the Start Button and in the search box type in CMD


Right click CMD.exe and select run as an administrator. This will open up the elevated command prompt accept any user account control prompt.


In the Window type slmgr.vbs /upk and then press enter.

You will get a uninstalled product key dialogue box and also perhaps this:





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