I don't have commodo but assume there is an icon for it in the taskbar (near the clock) or else you may disable it through the start and program menus or again in the security center located in your control panel.
I must say, though, while anything is worth a try, I would be more then surprised if it is somehow being blocked by a firewall. You have rebooted, installed new drivers, cleared out the spooler and now it just may be time to find a good version of "The last post" on youtube and put the thing out of its misery.