It’s why I said before “Don’t delete the 3 files but make a backup if a day they are required by the system.”
Perhaps a problem with the “SL UI notification service”. This service have to be disabled and stopped before the moving of the files (SLUI.exe, SLLUA.exe and SLUINotify.dll). Don’t forget to restart W2k8 before the moving of the 3 files.
I can assure to you, there is no problem with that method tried with Vista Ultimate installed since several months and W2K8 installed now since several weeks. All is good and Windows Update and other stuffs work fine.
What is your method please ?