Extend Microsoft Windows or Office activation period

If you are using Microsoft Windows 7/Vista or Office as a trial, you can extend it from the default 30 period to 120 days by doing this: Simply click on the Start button and in the search window, type in cmd and you'll see the Command Prompt at the top of the page. Don't press Enter yet — instead, right-mouse click on the shortcut and select Run as Administrator. Now, after the Command Prompt loads up, type this: slmgr.vbs -rearm and the hit Enter and reboot. That's it.

1. Click on the Start button and type in "cmd". Don't press Enter and instead right-click on the shortcut and select "Run as Administrator".
2. Type slmgr.vbs -rearm and then hit Enter.
3. Reboot.

And now it should be good to go for 120 days.