What is Virus scanner/cleaner? What functions does it perform?

Virus scanner/cleaner software are computer programs to identify, prevent, and remove viruses from our computer. It helps us to safeguard our data from virus.

Antivirus software performs the following functions in our computer:

1. Scan the computer files to look for virus.
2. Identify suspicious behaviour from other computers.
3. Remove the programs which indicate infection.