Saw via Slashdot that Microsoft Update Quietly Installs Firefox Extension. Technically I'm sure it wasn't silent, and that somewhere buried in the small print it said it was going to do this, but still, that's no excuse. AVG does the same thing to show "safe links" in your google results, and I have the same opinion. Don't F-n do it. Or if you do, have it on a separate page of the install wizard, defaulting to no showing clearly what you're doing. Like Sun does for the google toolbar (or is it yahoo now?) when they do a java update. Well, without the default to No that is.