so much negativity for comodo on here. true, they have mediocre sigs, but do we really want all the AV companies using bitdefender's engine and sigs, lol. i kinda like a company that develops their own thing. and besides that, they have additional mechanisms that compensate for the poor sigs. your system isn't really infected if it's in the sandbox. so if a new malware is isolated from your system, and later removed (when comodo's slower sigs catch up), it is still removed and your system secured. while a competitor might let that new malware enter your system unhindered and create havoc (because without the sig it isn't a recognized threat), and after it's too late try to clean it up after they discover this new threat. while they may develop the sig faster, if infected, your clean up is going to be far worse.