This is wrong, Avg was best before, now its just worse than ever (alot of false reporting). Third party reviewers have given Microsoft Security Essentials the top score lately. MSE isn't slow on blocking the newer viruses either, just as fast as everyone else. I would even say Avira is better than AVG. tl;dr MSE>AVAST>AVIRA>AVG (according to 3rd party testers, on the web and in PC World Norway) Also make sure you dont have two antivirus installed at the same time, it clogs up the quarantine folder. Its also proven that you dont need any paid antiviruses, they're just memory hogs. Okay I'll try out MSE thanks everyone.