Sophos Anti-virus is not running

For some reason, I get this errors once in a while. 

My DNS is set to &

While this is a problem that needs to be fixed, PLEASE also take some time to make this popup message less obtrusive. Errors like this should only be this obtrusive if the user can actually do something about the message. This is not the case right now. 
On some days it pops up multiple times an hour, interrupting my work, canceling text & window selections. 


While this message pops up, I can confirm that I am still connected to the internet. 

The Sophos icon in the menu bar is then greyed out, and after a while seems to 'fix itself'.

Please point me to the direction of a solution or a way to suppress the notification.