(Can a moderator please move this to the appropriate board)
Hello amigafan sorry to here about your troubles. Are you running any other security applications that may interfer with comodo? Please check your defense+ and antivirus events.
Comodo → Defense+\Antivirus → events.
Is there anything listed there?
What kind of file are you trying to copy? or is the problem in general?
I was having the same problem. Speed between a RAID 0 array and a RAID 5 array was hovering around 7-8 MB/s for any kind of files, including large ISO files.
After disabling Defense+ speed went up to around 90-100 MB/s.