F/w leaves f/w driver and kills internet conn 1/2 through upgrade

The choice of firewall + antivirus modules is made when installing Comodo CIS
In your situation, I recommend the following operations:

  • Get the following freeware

IObit Uninstaller 12 Free

  • Uninstall all Comodo products
  • Restart the PC
  • Open CMD in administrator mode
  • Copy/paste this command
    %temp%
  • Delete all files
  • Place yourself in CMD mode in administrator mode to check the integrity of the Windows system and copy / paste this command
    sfc /scannow
    Then Ok, wait for the control/repair
    Restart PC
    Go here to download CIS 8012

Comodo Internet Security 2020 v12.2.2.8012 Released

Proceed to install