The xp-AntiSpy is a little utility that lets you disable some built-in update and authentication 'features' in WindowsXP.
For example, there's a service running in the background which is called 'Automatic Updates'. I don't know what this service transfers from my machine to other machines on the internet, especially the MS ones. So I play it safe and disable such functions. If you like, you can even disable these functions manually, by going through the System and checking or unchecking some checkboxes. This will take you approximately half an hour. But why wast time when a little neat utility can do the same in 1 minute?
xp-AntiSpy was successfully tested by lots of users, and was found to disable all the known 'Suspicious' Functions in WindowsXP. It's customiseable, but comes up with the Default settings, which are recommended.

This utility is DONATIONWARE! This means, you don't have to pay anything for this program and you can give it to anyone who's interested in it, as long as you don't sell it. If you find this tool useful, and wanna gimme something back, think about donating a small amount of money.

What's New in xp-AntiSpy 3.96.8 :
· Fixed bug in the setting 'Disable identification of player by websites'
· Added setting: 'Disable Java Script in the PDF-Reader'
· Fixed bug in the time server settings dialog
· Fixed bugs in the command line options

What's New in xp-AntiSpy 3.97 Beta3 :
· Open the device manager via 'My Computer'
· Do not offer the Windows Tour anymore
· Avoid automatic links in the network neighbourhood
· Do not cache thumbnails
· Disable the search assistant
· Disable UAC (Vista only)

• Bugs fixed:
· In the setting "Disable File Association Web Service" a little bug sneaked in.
- Some minor GUI bugs.