Extend Windows Vista Trail to 120 Days

By default you can use the free trial of Windows Vista foe 30 days even if you do not buy it. But there is a trick that you can try to extend your 30 day trial to a period of 120 days easily and it is legal to do this. Right-click on the My computer icon on the start menu and you’ll see the basic system information window, and you will also see the amount of days you have left to activate than type the following key to extend it to 120 days:

Product key: 89580-014-0000025-71495

Open up an administrative mode command prompt by typing in cmd into the start menu search box, and then hit the shortcut Ctrl+Shift+Enter to launch in administrative mode.

Now run this command from the prompt:

slmgr-rearm

It will take some time, but after some time a dialog will appear telling you to reboot your system. Reboot your system and you will see that the activation period has been reset to 30 days. Here you are done.

Note: that if you want to get a full 120 days out of this tip that you need to use this command on day 29 or 30 of your trial mode. You can only use this command 3 times.

If you are facing the problem of already getting locked out (Reduced Functionality Mode) you can still reactivate Windows Vista if you have more resets left. If you’ve already used up all 3, then you are out of luck, but if not, you can follow these steps to unlock your computer again.

First, Open up Internet Explorer, and type C: into the address bar. You’ll be prompted for UAC.
Now type in C:WindowsSystem32 into the address bar, and find the cmd.exe executable. Right-click it and choose “Run as Administrator” and then your system will start working as it was before.