For uninstalling McAfee firewall without a disc get all the running programs closed in order to prevent their interference with the removal procedure then click the bottom left corner that is the start menu then choose control panel from the application window further select “more settings” and then select “programs and features” then select your antivirus version from the list that appears then click “uninstall” then uncheck all the boxes except for “personal firewall” after that get your system rebooted.