This is definitely one of the best free anti-virus out there as it has high detection rate compared to AVG and AVast. Source
However, whenever you complete an update of this anti-virus, there will be an irritating pop-up. This is caused by avnotify.exe residing in the installation folder. To disable the pop-up, we need to restrict the access of this bugger.
Do take a good look at here. It tells you how to disable it and the anti-virus is good to go! No more annoying and irritating pop-up!
Cheers! 
