AVG and Threatfire also tags these files as bad. I've also confirmed these files as bad by Googling them. Every other antivirus program I've ever used--quite a few--gives you the option of permanently removing the files from the disk. Why not COMODO?
The fact that they are in quarantine and my system is working OK indicates that they are not critical.
Again, is there a way of permanently deleting files that have been put into quarantine?