ID-Blaster Plus

ID-Blaster Plus helps you to destroy tracking tactics by randomizing GUID/Unique ID numbers found on your computer.
In Windows, many applications have something called a "product ID number", a "GUID" or a "Unique ID number".

This number may be the same throughout Internet Explorer, Windows Media Player - even the operating system itself.
Since this number nevers changes, it would be the perfect way a malicious person or even an advertising company could track your habits - perhaps through a malicious website ActiveX control, or Java applet.