My Antivirus will not scan

I can open my antivirus, but it will not perform deep scan or Mac scan. It is "stuck" on 0%, and says after 2 minuts that there are no virus'.

I have tried to log out and log in to my network again, and I have closed my computer several times, but it is still the same when I open it again.
I have also tried to reinstall antivirus - but it is still the same.

Has anyone had the same issue? How do I solve it? 
Thank you!