I am having a similar problem, but not when viewing anything on this site. I can “view” anything on the net.

My problem is when I am trying to download anything off the internet (any type of file, i.e. New drivers for my Vid card or a ".pdf" file with specifications on my TV.) I get the following message......” You might not have permission to view this directory or page using the credentials you supplied.””

I am fairly certain this started either when I patched SP2 or installed a new Firewall (I did both on the same day.) But even if I disable the firewall I still cant download any files. Anyone know how to fix this?