Extend Vista Activation Period to 12 Months

Martin Brinkmann
Mar 15, 2007
Updated • Jun 2, 2013
Windows, Windows Vista

You may know that you can extend the period that you can use Windows Vista without activation. Microsoft gives you 30 days before you do need to activate the operating system. The Windows operating system supports a command that you can run to extend the period three times for 30 days each, so that you can use the operating system for 120 days without activation.

Ryan from Cybernet published an article today that explains how every Windows Vista user can extend the activation period by the factor three raising the total period that Windows Vista can be run without activation to 360 days.

The first steps are basically the same as before. Run the command prompt as an administrator, you can do this by starting cmd and pressing CTRL + SHIFT + ENTER. Type "slmgr -rearm" and hit return. The activation period will be reset to another 30 days after a reboot. To check if this procedure was successful you can type "slmgr -xpr" at the same command prompt after the reboot.

This was the usual way of extending the Windows Vista activation period from 30 to 120 days.

We are now going to increase this period so that you can use the system for 360 days before you need to activate Windows Vista. Open the Registry by entering "regedit" on the command prompt or run box, and navigate to the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SL

Right-click the SkipRearm key and choose to modify it. Change the value to 1 and close the Registry editor again. Start the command prompt as an administrator and type "slmgr -rearm". Reboot the PC and the Vista activation period was reset to another 30 days. This can be done eight times.

To outline the process again:

  • slmgr -rearm as an administrator in the Windows Vista command prompt (3 times)
  • change SkipRearm to 1 in HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ SL
  • slmgr -rearm as an administrator in the Windows Vista command prompt (both 8 times)

This extends the Windows Vista activation period to 360 days.


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  1. shant said on April 3, 2009 at 10:56 pm

    can i update windows after the first 30 days?

  2. Ben said on September 28, 2007 at 6:13 am

    Well i need some real help!
    My 30 days are up and i’ve lost my product key and i downloaded Magical Jelly Bean Keyfinder and it found a key and i put it in and it said please enter a another key and it didnt say it was wrong and i just dont know so if anybody could help me?

  3. michael said on August 24, 2007 at 7:13 am

    hey nette, go to youtube.com and look up windows XP activation crack then take a look at some of the vids, there is one video in particullar and LOOK AT THE COMMENTS!!! some of these are virus’s i will not lie but i did one of these bc the comments said they worked and guess what..it worked!!!!!!!i opened the windows activation thingy(give me a break im a kid) and it said windows has already been activated…yeah it was kool(give me another break i am still a kid i didnt get older during this comment posting

  4. nette said on June 19, 2007 at 5:21 am

    does this same trick work for XP?

  5. vasu said on April 14, 2007 at 10:07 am

    yes cracking of software not means cheating it means how you secure your product frome outsider/hacker.

  6. Kelly said on March 29, 2007 at 9:29 am

    Which is the SkipRearm key ?

  7. Rado said on March 16, 2007 at 10:32 pm

    This is a great tip.
    However I will stay with WinXP for a while, right now I can’t see any advantages of Vista…

  8. ilo said on March 16, 2007 at 5:18 pm

    There will allways be a crack :D

  9. Albert said on March 16, 2007 at 1:48 pm

    I’m pretty sure Microsoft will soon release an update that will not allow this command to be run. I can only imagine how much money they are losing, or what will happen to their stock when this ends up on the news.

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