This is indeed a great article and discussion:

http://blogs.msdn.com/aaron_margosis/archive/2006/...6.aspx

The whole thing is about what is better having on your PC: an anti-virus that requires an administrative account to run (like administrator) or no anti-virus at all but in this case you logging in with a limited user account (LUA)?

Great points by the author and others. Worth reading for sure. I think there is a lot there that is related to a TS environment (where all users should be in many ways restricted).