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Windows 7 : Rearm and Extend Windows 7 Activation Grace Period to 120 Days

You an install Windows 7 without any product key for free usage of 30 days as evaluation period. During the 30-day activation free grace period, user does not need to activate Windows 7, and can use Windows 7 of any edition in full functionality.

Windows 7 also equip with a secret ‘rearm’ key in order to reset the free 30-day evaluation period limitation, which allows user to extend the activation-free usage or evaluation expiry date of Windows 7 for another 30 days legally.

By using the ‘rearm’ hack, user can reset and extend the activation grace period (aka evaluation trial period) for up to 3 times, effectively running Windows 7 without product key without activation for up to 120 days, or 4 months. The trick is, the rearm hack must be done only when the 30 days trial period or activation grace period is about to expire.

Follow these steps to reset and extend activation grace period from 30 days to 120 days in Windows 7:

Install Windows 7 without any product activation key.
After installation is completed, use the Windows 7 for 30 days and wait for the remaining days left to activate Windows counting down to 0, or almost zero.
When the activation grace period (or evaluation trial period) is almost expired or ended, log on to Windows 7 desktop, and open a Command Prompt window (i.e. type Cmd in Start Search and hit Enter).
Type any of the following commands into the command prompt, and then hit Enter: sysprep /generalize
slmgr.vbs –rearm
rundll32 slc.dll,SLReArmWindows
slmgr /rearm
Reboot Windows 7 to enjoy another 30 days of free usage without worrying about activation nor even need to crack Windows 7.
When the activation grace period countdown timer almost running down to 0 again, repeat the ‘rearm’ trick to enjoy another 30 days of Windows 7 for free. User can run the rearm command for maximum of 3 times.