Antivirus programs are only as helpful as their virus signature records. Since it’s not possible for one company to locate and break down every latest virus that emerges. Antivirus companies collaborate with one another. The moment one antivirus company creates a new discovery; it distributes the information with its competitors. This arrangement facilitates all antivirus companies keep their programs up to date.
Since no antivirus software can detect 100% of all viruses, it’s good to run two antivirus programs at a time. But that can get costly. Here’s a cheaper option.
Avira Antivirus
www.Free-av.comAvast Antivirus
www.avast.comAVG Antivirus
www.grisoft.com