Expand Vista Trial Period Legally....!

The great thinks about Microsoft is that they are giving a 30 days Evolution period for vista users to activate their Windows Vista, this let the users to to get habituate with the new operating system before before buying the activation Keys from Microsoft...!
May be some user thinks that 30 days is not enough for them to study the new OS in that case You can Expand the trial version to up to 120 days. Remember it is a legal way and we are not using any crack, Patch or any Pirated code..
Just follow the steps :
Suppose you have 12 days remaining for your activation, something like this(1) 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.
(2) Now run this command from the prompt: "slmgr -rearm"
It will take a little while, but eventually a dialog will pop up telling you to reboot. Do so, and you'll see that the activation period has been reset to 30 days...Note that if you want to get a full 120 days out of this tip that you need to use this command on day 29th or 30th day of your trial mode. Remember you can only use this command 3 times after the first one i.e a total of 4 times after that you have to purchase the original License from Microsoft...!