This programs worth a look at
XP-AntiSpy is a small utility to quickly disable some built-in update and authentication features in WindowsXP that may rise security or privacy concerns in some people. For example, there's a service running in the background wich is called 'Automatic Updates', that may sound useful to most people, but 'suspicious' to others. You can disable al these features manually by going through your configuration, find the settings for each etc, however with XP-AntiSpy there is no need to do this, since it will show you all of them at once and let you choose which ones to disable. Not only will it save you a lot of time disabling them - it will also allow you to quickly re-enable them if you change your mind.