a-squared (a2) Personal is a Malware scanner and remover of the latest generation which is specialized in Trojans, Dialers and Spyware. So it is the perfect addition to your existing antivirus software. The a-squared background guard prevents harmful programs running on your PC. It blocks Malware before it can become active. To do so, it uses our unique and highly effective behavior analysis technology to provide an Intrusion Detection System (IDS) which alerts you immediately if any running programs exhibit suspicious behaviour. Reliably prevents against: Trojan Horses, including keyloggers and backdoors, which open up your PC to attackers control or use your PC to send spam emails; Worms - Bagle & others are worm viruses which usually arrive as an email attachment. Worms can destroy all your saved data; Dialers - Change the dial-in number of your modem connection to premium rate numbers causing high phone bills; Spyware - Adware and HiJackers continuously show annoying popup ads and spy your private data as well. Currently more than 90,000 different types of Malware can be detected and removed securely. Free online updates provides best protection.