Brian Livingston, a Windows expert has revealed to users of windows that it is possible to use Windows Vista legally without Activation for a year. Though, Microsoft has labeled this a ‘hack’ to signify that it is illegal, it stated just a month ago that this process would not be a violation of the End User License Agreement (EULA).

Livingston revealed that a one-line command lets users postpone the activation up to three times. Combine this with the 30 day grace period that Vista comes with, and you have 120 days to activate the operating system. In fact, Livingston claims that Microsoft has built a feature in Vista that allows users to postpone activation not just three times but many times more.
Microsoft documented the key and described it as SkipRearm and describes it as follows:

SkipRearm specifies whether to run the Windows Software Licensing Rearm program. Rearming a computer restores the Windows system to the original licensing state. All licensing and registry data related to activation is either removed or reset. Any grace period timers are reset as well.

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