Critical ? no ?? are you joking ? (definitely yes, it is).
I am afraid to say that having my computer not protected, I say no; i hope we'll see a new version coming very soon. In the meantime, I changed antivirus, as I do not want to de-install, re-install, repair again and again, I am not IT guy, do not want to loose my time with this. An antivirus is supposed to run (and work of course) on its own silently in the background.