XP Guard is a fake anti-spyware program which promotes themselves through the use of false advertising in some malicious websites. When visiting these websites, users will be noted that their computer is flooded with numerous infections. Even though they have closed the pop-ups, they will also be presented with another website that trying to full scan your computer, and when it finishes, it will state that your computer is infected with a variety of malware and the only way to remove the infections is to register the full version of XP Guard. But please remember that, these found infections are exactly legitimate Microsoft files. Do not trust any notification of XP Guard and you should immediately remove XP Guard from your computer right now!