Microsoft Office needs to be activated after 30 days. It can be rearmed 5 times, every rearm gives you additionally 30 days to activate.
If you always rearm it on the last day before it has to be activated that makes a total evaluation time of 6 * 30 = 180 days.
You can use this tool to rearm Office 2010 5 times. Just re-apply once the 30 days are over.
Version History for Office Trial Extender:
Improvement: Supports Office 2013
Update: Renamed to Office Trial Extender-
Update: All files are digitally signed
LibreOffice is a powerful all-in-one office suite for Windows and Linux that combines pretty much everything you need to increase workflow productivity. Portable version also available.
Microsoft Office 2007 [ 2015-10-16 09:26:07 | N\A | Shareware | Win 10 / 8 / 7 / Vista / XP | 5 ]
Apache OpenOffice For Windows is a free, Open Source MS Office alternative with a Word-compatible word processor, a complete Excel-compatible spreadsheet program, and more. Portable version is also available.