This article will show how to register Windows 7 Upgrade when it was used for a clean install (no prior Windows OS required). This method can register Windows 7 Upgrade on a new computer install or a reformatted hard drive. Using a Windows 7 Upgrade license can save $100 versus the price of the full Windows 7 version. This hack for Windows 7 Upgrade is legal if you own a complete copy of Windows XP or Windows Vista and is easier than installing or reinstalling the same or an old version of Windows.


  • Press the Start Menu.
  • In the "Search programs and files" text box type "regedit" and press ENTER.
  • Click "Yes" on the "User Account Controls" window.
  • This will open up the registry editor.

  1. Click the arrows next to the a registry key to open the registry folder:
  2. HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/


In the OOBE Folder, double click on the "MediaBootInstall" key.


Change the Vale from "1" to "0"


In the command line window, type: slmgr /rearm

Press ENTER.


Close the command line window and reboot Windows 7.
After
Windows 7 starts, click on Start Menu, right click "Computer" and select "Properties". Type in your product key and activate Windows 7.