I have used Comodo for years. My opinion is that they have the best security package on the market. BUT !! I used Comodo CIS-v3 for a long time with no problems and felt that my PC was being protected by a program that was unequalled. Fine, but when CIS-v4 came out, I naturally updated. Catastrophe ! The Firewall kept failing. I uninstalled and reinstalled CIS-v4 FIVE times and the same thing happened. The Comodo help team were as useful as a pain in the head. I dumped it and went back to just the Comodo Firewall Pro with Defense + free version, which I have used to this very day. It has been no problem, but I cannot update it because Comodo keep saying that a new version is available and I know what that means - CIS-v4 or 5 with all the problems I had before. It is NOT an update, it is a complete reinstall and all my Firewall and Defense + files will be deleted. Start from scratch and re-invent the wheel - back to the Stone Age Johnny boy eh ? I recently tried to install their Firewall-v5 but again it failed to install. Having followed the standard uninstall procedure for CIS-v3 and v4, I found months later by a manual search that over 300 bits of crap were still on my PC from CIS ! They all went into the Recycle Bin and are still there. I find it deplorable that a worldwide reputable and leading company like Comodo can install a program onto a perfectly clean system and leave a colossal amount of junk on a users system when the program is uninstalled. They even have a special program for extracting their crap over and above the standard uninstall procedure ! If it was not that I regard the Comodo Firewall as being far ahead of any other, I would not touch Comodo with a barge-pole. Their loading time at start-up is disgraceful. After this glowing tribute to Comodo, if anybody can really recommend an equally good Firewall, I will gladly dump Comodo into the history books and start again as a BORNE AGAIN PC PLODDER. Just a point - I do like the HIPS protection and am attracted to Online Armor but await your comments.