Can't stop a Steganos AntiVirus scan running even though I am the Administrator

I’ve just installed Comodo Pro. My Steganos AntiVirus programme normally starts off immediately to run a full system scan, but, having found that this can use up rather large amounts of system resources, I normally just terminate it. On my first running of Comodo, before having had any chance to mess with any settings, I am told when I try to terminate the scan that only the administrator can do that. I AM the administrator. What setting has Comodo altered that has deprived me of this status?

What version are you running? Can you also provide other Security applications on your PC.