Microsoft Internet Explorer 7 changes many security defaults, and a few applications are having problems with that. McAfee has put up this page of instructions about how to make its products update correctly after IE7 is installed.
Go take a look at the instructions. A couple of things come to mind.
First: that is a stunningly awful thing to put customers through. It is hard to understand how Symantec and McAfee got to the point that every single interaction with their programs is a struggle.
And second: did IE7 take McAfee by surprise? It’s been in development for years and I’m not aware of any sneaky last minute maneuvers by Microsoft to change its security settings. Why didn’t McAfee change their programs long ago to avoid putting people through an ordeal like this?