Update on my post of the 4th re the Microsoft patch not being processed if your a/v s/w isn't on their list.
This is a link to a document of various a/v s/w which shows the current status of a/v s/w:
Link to the document
AVG, Norton, Symantec are on the list. McAfee is supported but is yet to sort out the registry key.
The registry key referred to is in the computer registry. It's a key which Microsoft states must be set for the update to be processed. There are suggestions that Microsoft won't let any future updates be processed until that key is set. I think that for many of us that key will be set automatically by your a/v s/w. I have ckecked on mine and it has now been set. I won't go into details as unless you know what you are doing, tampering with the registry editor on your computer will make the computer unusable.