Windows – The system administrator has set policies to prevent this installation

April 23, 2007


This normally happens when the Windows Installer is not registered or the services which is not started.

1. Open a CMD.EXE prompt.
2. Type msiexec /unregister and press Enter.
3. Type msiexec /regserver and press Enter.


Reinstall the Windows Installer from Microsoft website.


Signing Off Now



  1. This didn’t help me but I can recommend something for others with this error to try. It fixed my problems.

    When trying to install SQL Server 2005 Express initially, it would keep failing due to an issue with MSXML6.0. So I tried to install MSXML6.0 manually after downloading it from Microsoft but I would continuously receiving the “The system administrator has set policies to prevent this installation” error message.

    After trying many recommendations from many sites over several hours, here’s how I fixed it:

    – downloaded and installed Windows Installer Cleanup Utility (available here: http://support.microsoft.com/kb/290301)
    – ran this utility to remove the installer configuration for MSXML6.0
    – VOILA!

    I didn’t have to even reboot my machine for it to just start working again.

    I hope this helps others avoid the frustration I was feeling,


  2. Thanks Kris! This helped tremendously! It worked perfectly! I do have a question as to do I re-install the the “windows installer” or will it do it automatically?

  3. i have exactly the same case as Kris just said, but the solution that Kris said does not work with me, please help if someone know how to solve this issue

  4. Thanks Kris!!

  5. Thanks Kris !! .. been looking for hours for a solution (and tried bout everthing else found on the web)

    @ Xenda : have you tried this : http://www.appdeploy.com/messageboards/tm.asp?m=8872&mpage=1

  6. You solved the same problem for me too! Thanks a lot!


  7. i have the same case with you that when i trying to install MS Sql 2005

    Work great..
    Thanks Kris !

  8. superb, ya i was so fed up with this problem that i have to sit for a whole day but it
    installed like a rocket.

  9. Dude, you solve THE great problem I have.

  10. Thank you, Kris! This worked with my PC, too! Now I can finally begin downloading antivirus software…

  11. This worked for me. Thanks!!! Saved!


  13. I tried the solution from Kris’ and it worked.
    Install the window cleanup utilities.
    Start that apps, and you will see the name of the app you tried to install but having a problem.
    Highlight that apps name, and click “clear” or “remove”

    Then reinstall the app working fine.

    Thanks a lot Kris.

  14. This worked for me too.. Outstanding. I was beginning to blame our AD guys that they broke my machine with some obscure group policy.

    Thanks again.

  15. Thanks that helped me too. I agree with Runtime213 youre a badass

  16. Good one dude it worked,Thanks 🙂

  17. Original post by jMs helped me.

  18. Thanks a bunch Kris!!! This worked perfectly on two computers for us today. One was Windows XP SP2 and the other was SP3

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