I already have Balloon messages turned off and still receive AV update notices.
No big deal, as I don't mind the AV notices, but obviously some do. Maybe add an option to disable these notices (separate from other balloon messages).
I don't mind the AV update notices either. I was using avast previously with the comodo firewall "only" and did like that feature with avast re the AV notices. Now I am trying out the anti virus part along with the firewall in comodo and I do like the AV update notices. Not a big deal to me as they are only there for a few seconds and then are gone. I hope that they won't be disabled completely and the option be left to the user to allow them or not.