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Previously we cover  Windows 7 Pre-Beta M3 Build 6801 can be download over the torrent network. However, the Windows 7 Pre Beta build will be automatically expire after 30 days trial periods once installed. The trial period limitation can be overcome unless you have attend the PDC 2008 event and getting the Windows 7 activation key for unlimited trial run.

However, here is a simple trick to extend Windows 7 trial experiences from 30 days to 90 days. This Windows 7 hack trick is actually old method Windows hack to reset the activation expiry date on Windows vista pre beta.

By using these tricks, you can extend Windows 7 trial more than 2 months by typing few commands only. However, this method only works twice so make sure to use it only when your 30 day trial period is about to expire.

Step tp extend Windows 7 trial periods for 30 days to 90 days:

1. Download Windows 7 Pre-beta and burn the ISO using Burning software.
2. Install Windows 7 Pre-beta and while installation make sure to not put any activation key.
3. Once the installation is complete, open Command Prompt.
4. Type any of the following three commands.
   sysprep /generalize or slmgr.vbs –rearm or rundll32 slc.dll,SLReArmWindows
5. Hit Enter
6. Reboot Windows 7 and enjoy another 30 days of free trial.