DavidR
2
How are you looking for this Scheduled Task as I believe it is a hidden task - See image of my WinPatrol Plus, which shows AvastEmUpdate.exe scheduled to run twice a day.
Check your comodo firewall and ensure that it allows avastSvc.exe, if there is an entry for it and it is allowed, delete the entry for it and reconnect to the internet. Comodo should ask permission again. For updates to work the firewall also need to allow instup.exe which handles installation and updates.
Disabling security based applications may still have drivers running and this could have an adverse/unexpected effect.