Many People have different opinions regarding the best anti virus software, Many say Symantec, the others swear by Kaspersky and the rest by Avast.
But Here is a simple but very effective Test by which you can check the strength and effectiveness of your Anti Virus Software irrespective of any particular Anti Virus Software that you might be using.
If your Anti-Virus software passes this test successfully then you can be sure its a good Anti Virus Software and will do it’s best to protect your PC from Viruses and Malware.
The Test that we are going to perform on the Anti-Virus Software was in fact Created by European Institute for Computer Antivirus Research to test the effectiveness of any Anti-virus and this is harmless for your computer.
How to Check your Antivirus’ Strength
First, open Notepad. Then copy-paste the below text.X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
Which would look like this:

Now select File, Save, select All Files for the file type, then save the file as “Virus Test.com”.
Now, scan the Virus Test.com file manually (some will automatically detect it).

Cheers if your Anti-Virus detects it as a Virus.
If not, You probably would need to change your Anti-Virus program.