There is a new antivirus product called Vipre made by a company called Sunbelt Software (in Florida). It is supposed to make use of new technology (a mock operating system) and is supposed to be much faster and use far less resources than other antivirus programs. A guy told me the performance of his company went from night to day using the Vipre program and that the product actually finds stuff on his computer. Malware is identified when it attacks the mock operating system which has a mock registry, etc., and also by signatures and behavior. Pretty interesting.