Over at How To Geek, someone has posted a walkthrough that shows you how to extend your 30-day trial of Microsoft Office 2013 or Office 365 to up to six months. You don’t have to do anything illegal or download shady software, either. Everything you need is already on your computer.
To do it, follow these steps on or before the 30th day of your free trial.
1.) Go to the “Microsoft Shared” folder in Windows Explorer.
2.) Hold down shift and right-click the “OfficeSoftwareProtectionPlatform” folder.
3.) Select the “Open command window here” option.
4.) Type OSPPREARM.EXE and press enter.
That’s it. If you do that on the 30th day of your free trial every month, you’ll be able to extend the trial for six months. Neat, huh?
For screenshots of the steps, click here.