I have used KIS RC 445, the funny thing,
is, that AV destroyed my system, (win 7) One day, I just wanted to roll back my system (system restore) to some earlier state, the restore process not finishes (it said that the system restore was not correctly restored, after that my win 7 ultimate could not load, I tried to restore via advance system restore (with dvd disk/flash stick) and I wasn't succeed, that funny think, that I had no virus or something else that could harm my computer boot, and I have configured my KIS to maximum protection level (like you have did harlan4096) and before my boot load fail, I scanned with HitmanPro+Zemana+Malwarebytes, so that my system was clean!
So now I will stay away for a quiet time From KIS, and will stick wih Emsisoft IS.