Windows 7 'free for first 120 days'

From Telegraph -

Microsoft has confirmed that users will be able to use Windows 7 for up to 120 days before they need to buy it, after which they will be asked to enter an activation code.

Officially, the trial period lasts for 30 days, but a loophole has been found in the Windows 7 verification process that will allow computer users to "reset" this clock up to three times at the end of each 30-day period, for a total of 120 days. Windows Vista had contained a similar loophole.

To "rearm" Windows 7, users need only type "slmgr -rearm", without the quote marks, at the command prompt. Once the computer is rebooted, the activation calendar will have been reset to zero, giving users another 30 days of free use.