If you have installed an antivirus and you are not sure if it is protecting your pc
fully or not? just try this popular test....
just type in
(without quotes "")
save this with ".con" extension like: "eicar.con"
scan this file with your antivirus
if your antivirus detects this file- Antivirus is working as it should be...
most antivirus will pop out a message
and if your antivirus doesn't detects it
There's a problem with your installation So, re-install your antivirus