I downloaded both the Comodo AV and Firewall to replace ZoneAlarm free some months ago and until today was reasonably happy. Today I downloaded a file from an untrusted web site and immediately got suspicious when it ran but did nothing (I know - I shouldn’t have done that!). I scanned the file with Comodo and it declared it Virus Free. I did a full scan and it found nothing.
Then the Firewall started reporting that a strange file “loader.exe” was trying to access the Internet. Immediately I disconnected all network access and started looking around. Sure enough, “loader.exe” was a Backdoor Trojan and was recording keystrokes.
I had a copy of AVG Free available and did a scan with AVG. Bingo - it identified “loader.exe” as a Trojan and immediately moved to remove it. I then did a full scan and it found other copies of the same file and deleted them.
After the full scan I rebooted, then for added safety ran the system through Kaspersky AV. It came up clean. To double-check Kaspersky, I downloaded the file again - but did not run it - and scanned with Kaspersky. Sure enough it reported it as a Virus.
The moral of the story? Comodo totally failed and [b]did not provide the level of protection I expected/b. I can no longer trust the Comodo product and have therefore permanently replaced it with AVG Free. I would not be so harsh if it wasn’t that other vendors had already provided for a Torjan that has been in the wild for several months.
Do not use Comodo AV if you want real protection!!