Millions of computers are being infected by fake anti-virus programs using names such as Antivirus XP 2008 and Antivirus 2009. Typically you will see a warning pop-up on your computer saying that it may be infected, and that you should scan your computer with this software. Even if you click on the "No" button, the software scan runs and almost immediately tells you that it has found a bunch of dangerous viruses. To remove these threats they advise you to pay them a lot of money.

Strangely, no other anti-virus program is able to find these supposed threats. Instead all they find are Trojans, such as Zlob, which were used to load the fake warnings. Needless to say, you should never pay for a program that launched itself on your computer without you asking for it. Even if your computer really was infected, the chances are that this software will not remove any real infections.