With the internet age comes hordes of annoying stuff like adware/spyware and dumbass ware as I like to call it.
You can never be sure when you install something if it contains adware, so might as well keep Adaware from lavasoft on the system and run it after each install.. I know it sounds dumb, but the Office XP updates installed other random shit on the computer and adaware detected and removed them.. you cant trust anyone nowadays.. back to unix i go i guess