This might be a sequence issue... "If this user will take everything instead of picking and choosing, he'd get the one that is restricted - it requires the installation of something he doesn't know he needs."
Something like that.
Take the ones you want. Do the install, restart the computer and go back to UPDATE and see what choices you get. If it doesn't show up again, then WinUpdate has figured out what you know - "I don't want it, need it, etc."
If it does come back up, then I'd be curious what other element it's 'requiring' to be installed.