SystemDefender is a parasitical rogue anti-spyware application that appeared in the Internet on September 21, 2007. By presenting itself as a legitimate spyware remover, SystemDefender does not maliciously infect computers by being a downloadable program. However, that is where its similarities with legitimate software end. Once SystemDefender is installed, you will be offered a free system [...] Read more on SystemDefender removal guide

Rogue Anti-Spyware system defender, SystemDefender, Windows System Defender