I wanted to install a clean virtual instance of Windows 8 after purchasing the $40 upgrade from the Windows website, and encountered the dreaded “Windows 8 Pro Upgrade Product Key can’t be used to activate Windows after a clean install” when attempted to activate it.  Doing a quick Google search, I stumbled upon a great write up at the Microsoft answers website here.  Thanks to the expert tutelage of “BinaryInk” I was able to successfully work around the issue.

The instructions, are as follows:

  1. Run the registry editor (regedit) 
  2. Find the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\OOBE 
  3. Change the value for ‘MediaBootInstall’ from 1 to 0 
  4. Open an elevated command prompt (run as admin) 
  5. Run the following command: slmgr -rearm 
  6. Reboot

Using the above instructions, Windows 8 was successfully activated after the reboot.  Thanks BinaryInk!



One Response to Windows 8 Pro Upgrade Product Key can’t be used to activate Windows after a clean install – Fixed!

  1. Dishan says:

    Thanks….. Bro…

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