Extend Windows 7 30 day trial to 120days legally
Saturday, September 12, 2009 18:45According to Computer World even Microsoft has also confirmed this trick.
Microsoft allows users to extending Windows 7’s (any version) standard 30-day trial period to 120 days, using a little-known command. Windows 7 RTM’s currently available for download to subscribers of MSDN and TechNet services. If you have already downloaded Windows 7 from any unofficial sources, you can still do this to extend your trial to 120 days without entering any product key.
Here’s the trick:
1. Click Start - All programs - Accessories. Right-click Command Prompt and choose Run As Administrator.

2. Type the following command and press Enter:
slmgr - rearm

3. Once you see the confirmation message, close Command Prompt and reboot Windows 7 to get 30 days of free trial period.
This command may not work if you have already entered a serial key during the installation of Windows 7. You can run this command only a total of three times.
