How to know my antivirus is really working or not?

Have you ever wondered if your antivirus software is really working? Would you like to see what happens when it detects a virus? Here’s a safe way to test your computer’s virus protection that doesn’t require you to have a real virus sample.

First, open Notepad. Then copy and paste into it the text on the line below. (It should all be on one line.)

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

Then save it in any name and scan it