This. Malwarebytes is probably the best anti-virus out there and removes more shit than any other paid one I have seen. http://www.malwarebytes.org/ is the official site on where you can get it. It's really a must have nowadays.
Also the premium version is fantastic as well and can detect hidden drive-bys and hidden flash infected files that scanners normally can't detect.
^this is pretty good, i personally don't use it because i just like having all in one anti virus, AVG is one of the best if not the best anti virus out there. PM me and ill give you a link to a website where you can get a 90 day free trial key for AVG internet security (FULL PAID VERSION). When it expires you can request a new one and it will work i believe.