Extend Windows 7 Trial period to 90 days!!!

1. Download Windows 7 Pre-Beta M3 Build 6801.

2. Burn it on a DVD, and install Windows 7.

3. When installation is complete, open Command Prompt.

When your trial period is going to end then open command prompt, and follow the steps,

Type any of the three commands below:
sysprep /generalize
slmgr.vbs –rearm
rundll32 slc.dll,SLReArmWindows

This trick will increase the trial period of Windows Se7en!