to check if your antivirus is working properly or not ,just foliow the following steps:-
1.click start..>open a Notepad.
2.copy this code and paste it in the Notepad.
X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H* (copy it all)
3.save it under this name fakevirus.exe in any place.
4.if your antivirus Detected it in seconds this means that ur antivirus is working properly,if not u need to change it and get something much better.
thnx,i hope this tutorial has been helpful to u guys.