just saw your thread here.
One of the Virusscan Access Protection rules is set to block and report for a rule whose name is displayed (Prevent alteration of...). Possibly the WSUS installation wants to register some of the files for its own management and the Access Protection prevents this form happening.
Please go to the appropriate Virusscan policy that applies to the given client and select Access Protection category. Find the rule and deselect the block and report option both.
Watch out that you might need to do it for servers and workstations, too (the selectionis within the policy property page of the above category).
Wait until clients are doing an ASCI or wake up this client.
This can be easily solved.
Please go to to the McAfee Access Protection Properties.
The 3rd option. which is the Antivirus Standard Protection, The 1st option :- Prevent Registry editor and task manager from being disabled'. Now this gets very aggressive. This features just doesnt allow any changes to be made to the Registry Editor.
Please uncheck it and everything should work fine.