[Fyron]

You are already doing most of what needs to be done to minimize the risks of using IE. The other would be a powerful ad-filter to eliminate popup, popunder, etc. ads that are likely to install crap in your system through IE holes, though I suspect Norton Internet Security does something like that already... An anti-spyware program (Ad-aware and/or Spybot; most others are junk) run once a week or so completes the protection.

Of course, it is still better to go with a secure browser, such as Mozilla or Mozilla Firefox. They are based on the old Netscape (the new Netscape is based on Mozilla...), so adapting to Mozilla should be a snap...