Last month we told you how to extend your Windows Vista 30 day trial period for as long as 120 days. The process is 100% legal, and was put in Vista by Microsoft. All you have to do is enter a rearm command every 30 days or so.

We thought you could only do this 3 times, but now sites are reporting that there's a registry hack that allows you to rearm your system an indefinite number of times.

Of course, if you want a fully supported version of Vista, you're going to have to activate it. And if you want to avoid the hassle of having to reenter a key every thirty days or risk losing all of your data, you should activate your software. But if for some reason you might have a copy of the operating system and a reason not to activate it, this hack may come in handy.