Well I personally have never used Windows Update, ever, but just think of all those people who do. And thats beside the fact that there are other components of XP that are allegedly used to send back facts about your computer that most people ignore. When i stated "without your knowledge" i meant that it (Windows Update and inetinfo.exe, for example) both send info that the majority of users don't know is being sent: Windows update is "telling" MS the listing of pretty much all your programs on your computer (maybe through the registry). And possible inetinfo.exe is sending some other sort of information back as well (but MS states its for debugging...). Yes, the WU says it gathers info in its Users Agreement, but it doesn't state anywhere that it gathers the list of software ion your computer. You may think it's not harmful, but this is how MS gains an unfair monopoly.