If you have Windows 7 then definitely you must have got the Windows 7 pre beta keys along with it,remember that Windows is not a trialware,you cannot try the software unless you have the key.Those who want to extend the trial period for better testing the pre beta version of windows 7 or even the upcoming Windows 7 beta then here are the steps.It’s the same hack that is being used in Windows Vista to increase the trial period to 120 days.

Install any version of Windows 7 and remember not to enter the key during installation.

Once installed you can use it for 30 days.To extend open command prompt(you would find it in accessories)

1. Enter regedit in the search box and open registry editor.
2. In the registry editor go to the following-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ WindowsNT\CurrentVersion\SoftwareProtectionPlatform
3. Check whether Skiprearm is set to 0 or not.If it is not set to 0 then modify the value by right clicking on it
4. Close the registry editor
5. Now open the command prompt under elevated permissions.To open the elevated command prompt just right click on the command prompt and run as administrator.
6. In the command prompt type any of the following commands- sysprep /generalize or slmgr.vbs –rearm or rundll32 slc.dll,SLReArmWindows and press enter.The following box should appear-

7.   Now restart the windows and enjoy another 30 days of trial.

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