Hi, guys

Recently, I intend to upgrade TMG to SP1. I have download the SP1(TMG-KB981324-AMD64-ENU.msp) from MS download center. However, when I install it, it shows this error:

The upgrade patch cannot be installed by the windows Installer service because the program to be upgraded may be missing, or the upgrade patch may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade patch.

I have tried several methods on internet, but still have this issue. Now, TMG works well except web protection service, I have no license due to I install TMG in test environment.

I install TMG on windows server 2008 R2 datacenter, is it caused by this?

I really want to know what happened, why once I install SP1, it shows the error above.

Nice Day

• Edited by Timmoon Tuesday, January 07, 2014 3:21 AM