By Comodo do you mean the firewall or the firewall “and” the anti-virus? ???
You shouldn’t have two resident a/v’s at the same time http://www.bleepingcomputer.com/forums/t/260844/two-anti-virus/#entry1441638

To install just the firewall follow these instructions to the letter http://www.knightwithapc.com/2011/11/download-comodo-firewall/ :slight_smile: