Contributed By: Mohammed. Athif Khaleel [MVP SUS/ WSUS]
In many cases, I have seen AU Client stuck i

Actually, its a know issue now. For .NET Framework and SharePoint updates this is by "design" in the current version of SUS, and you cannot avoid it.

Because you can install any language version of .NET regardless of the OS language, SUS needs to cover this.

Lets see what Microsoft says;

From: David Dehghan [MS]
http://groups-beta.google.com/group/microsoft.public.softwareupdatesvcs/msg/c8e76952d44122da

From: Don Cottam [MS]
http://groups-beta.google.com/group/microsoft.public.softwareupdatesvcs/msg/3ae74bae2ede9550

From: "Chris Ard [MSFT]"
http://groups-beta.google.com/group/microsoft.public.softwareupdatesvcs/msg/5b04f0949cf1e56b

Hope this helps,
Athif
Mohammed. Athif Khaleel
"Save the Internet. Keep all Systems Patched"