Friday, July 24, 2009

“A fatal error was encountered” When Applying Service Pack 3 to Dynamics GP 9.0 on Windows Server 2008

First things first.  I would like to give credit to one of our technical consultants, Henry Pollock, for getting to the bottom of this one.

During a recent upgrade, we received the following error when attempting to apply Service Pack 3 on a Dynamics GP 9.0 install on a new Windows Server 2008 box.


Note that the original install of GP 9.0 had gone fine.  A little digging and it turns out you need to disable UAC (User Access Control) on Windows Server 2008 prior to running the service pack install.

If I were a betting man, I’d guess we’d come across a similar issue on Vista workstations.


  1. Hi,

    You are correct. Vista machines does have the GP & UAC issue. I encountered errors when I installed GP 10.0 on a Vista Business laptop. Please refer to my article:, for more details on that.

    Having said that, if it was GP 9.0 I would definitely have got this message. Thanks for sharing.

    Vaidy Mohan