Clean install and activation with Windows 7 Upgrade key

Don't you hate it when you replace a hard drive, install a perfectly legal copy of Windows 7 Upgrade and then try to activate it and it says it can't be activated because it is a clean install?  Here's a fix that worked for me:

  • Make sure there are no pending updates
  • Change HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionSetupOOBE  MediaBootInstall from 1 to 0
  • In an elevated administrator command prompt type slmgr -rearm
  • Reboot
  • Run Activate Windows and use your key!

Found it here. Thanks!

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