Change Windows Product Key After Install

Published in multiple categories by Steve Sinchak with 593,686 views

Do you need to change your product key so you can activate Windows Vista, Windows 7 or Windows 8 properly? You can use a great command line tool that will help you do this very quickly. Just follow these steps:

  1. Launch the Start Menu and type in command prompt or cmd so that it shows up on your start menu search list. Right click on the Command Prompt shortcut and select Run As Administrator.
  2. At the administrator command prompt, type in "slmgr.vbs -ipk <insert your product key here>"

    slmgr.vbs -ipk 00000-00000-00000-00000-00000
  3. To activate windows after changing the key, run "slmgr.vbs -ato"

Alternatively, if you want to use a graphical interface, run the following at a command prompt as suggested by Dave in the comments. 

slui.exe 3

Then just type in your product key and click the Activate button.

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is this going to rest the whold computer and delete all the files or just let you use microsoft office programs???
Posted by Megan on 5 years ago

thanks, works like charm!
Posted by Marty191 on 5 years ago

Please i'm in desperate need of help. When i typed this into the command prompt it gives an error message "slmgr.vbs -ato" but for the first step it was fine. I REALLY NEED HELP ON THIS, MY WHOLE LIFE AS A STUDENT IS IN THERE!!
Posted by Li on 5 years ago

Megan, this will only reset the Windows Vista activation timer. Everything else will remain the same.
Posted by Steve Sinchak on 5 years ago

Li, what is the error? Is your product key valid?
Posted by Steve Sinchak on 5 years ago

Posted by jM on 3 years ago

CMD replies: command syntax error ...?

Posted by Biser on 2 years ago

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