How we can protect computer from virus

The Antivirus is a software utility program. which  scan all the files on the computer hard disk.
Most Antivirus programs include an auto- update feature .
to know more about Antivirus GO TO THE LINK GIVEN BELOW

https://drive.google.com/file/d/0B7uUZVUKNK_la2RUeVNoSzY3WkU/view?usp=sharing

GO TO THE ABOVE LINK FOR KNOW ABOUT ANTIVIRUS