Extend the Windows 7 Trial from 30 to 120 Days

Did you know that you can install Windows 7 without any license key and use it for 30 days? What you might not know is that you can also extend that trial mode to 120 days, without requiring a key.

The basic way this works is that at the end of the 30 days, you’ll need to run a small command and reboot your computer, at which point you’ll have 30 more days, up to a maximum of 120 days. This trick should work regardless of where you got your copy of Windows 7 from.

Note: make sure to check out our screenshot walkthrough of the Windows 7 Beta if you haven’t already, because Microsoft is giving away beta keys that don’t expire until August 1st.

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Extending the Trial By 30 Days

The first thing you’ll want to do is check how many days are left in your trial period. You can do this by right-clicking Computer and choosing Properties…

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At the bottom of this window you’ll see how many days are left to activate (29 in my case since I installed this box yesterday).

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Now to actually perform the hack that will extend the trial mode, you’ll want to find Command Prompt in the start menu (or search for it), and then right-click on it and choose Run as administrator. (very important)

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Next you’ll simply type in this command:

slmgr -rearm

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Within a few seconds you’ll normally see this dialog show up, saying that the command has completed successfully, at which point you’ll want to reboot.

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Checking the system properties again shows that I now have 30 days left to activate.

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Of course you’d normally want to do this near the end, probably on the last day before activation. I’m pretty sure that you can even perform this trick after the 30-day trial expires, although I’m not certain yet.

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