I used to fix peoples reported problems if they weren't around, limited to only their intervention needs (i.e, no reboots). I actually sort of skimped on customizing the XP machine, but I've been refreshing on support for it, so I've activated things like Console, etc.
I usually just wait for the other person to be around, and suggest something that 'works better'. If they don't like it, it's their machine. If I had a nickel for every Yahoo toolbar I've deleted....