- Click the Start button , right-click
Computer, and then click
- Scroll down to the bottom of the window that appears, and then, under
Windows activation, click
Change product key.
- If you’re prompted for permission to continue the process, click Continue.
- Follow the instructions to change your product key and activate your copy of Windows 7.
Command Line Method
- Click the Start button and run
cmd as Administrator.
- Type following Command