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Clean Install Windows 8 with an upgrade key

technologyEdward KiledjianComment
Creative Commons Image - Flicker user Tripp

Creative Commons Image - Flicker user Tripp

Let's say you bought one of those $30 Windows upgrade promotion keys from Microsoft last year and now want to perform a clean install. What do you do?

The media you downloaded does allow you to perform the install but windows will refuse to activate a new install with that upgrade key. Unless you perform this magical process.

If you don't know what you are doing, stop and call a friend. If you make a mistake with regedit, you can harm your windows installation.

  • Start Regedit
  • Navigate to this registry folder HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE/
  • Double click on the MediaBootInstall key and change the value from 1 to 0
  • Open a cmd prompt with admin rights and execute this command: slmgr /rearm
  • Now you have to reboot Windows

You will now be able to activate your windows with that upgrade key you bought.