Not one antivirus has stopped things like Conduit from installing. So it's clear that you remain the best protection.
http://download.cnet.com/1772-20_4-0.html?query=10+best+antivirus&platform=Windows%2CMac%2CiOS%2CAndroid%2CLinux%2CWebware%2CMobile&searchtype=downloads shows that Avast and AVG are tops in popularity but again with none stopping the more common malware and download.com adding adware which isn't stopped, who would call these "best"?
Try Avast but get it with Ninite. Here's why:
I am a new PC user. so my experience low . so help need. And I know that for PC protection need antivirus. So what antivirus is the best ? Please help me