We all know that the recently released Office 2010 packs-in plenty of features and improvements. Users who have downloaded the Office 2010 30-day trial version can easily extend the trial period to 180 days with a simple trick.
Extending the trial version of Office 2010 requires you to run an Office command (OSPPREARM) located in your Windows drive. Running the command will extend the Office 2010 expiration date to 30 days. You can execute this command for a maximum of 5 times. So with this command you can use the Office 2010 for 180 days including the initial 30-day trial.
Extend Office 2010 trial period
1. Open elevated command prompt. To do this, type CMD in Start menu search box and hit Ctrl + Shift + Enter. Alternatively, go to Start menu, All Programs, Accessories, right-click on Command Prompt and select Run as administrator option.
2. As we said earlier, you need to run OSPPREARM tool from command prompt. To run it, you need to enter the full path of OSPPREARM in the elevated Command Prompt. Generally, it is located in “C:\Program Files\Common Files\microsoft shared\OfficeSoftwareProtectionPlatform” folder (where “C” is your Windows drive letter).
But if you have installed 32-bit Office in 64-bit Windows, it’s located in “Program Files (x86)”.
Now, type the full path (you can also copy and past the full path) of the OSPPREARM file in the elevated Command Prompt and hit enter.
3. Once done, exit the Command Prompt.
4. You are done! Note that you can use this command for a maximum of five times and when you try the command for the sixth time you will see the following error.
Thanks to MDL for this info.