Do you know what version of Comodo Firewall you are using? The latest is 7.0.317799.4142. any hasn’t been updated to a new version in months. Also ehat are your system specs? eg. Ram and Os version?
To find the version number, open the Comodo Firewall, and click on the (?), and in the drop down menu select “About” there you will see the version number.
Are you using the auto sandbox/HIPS or neither? Also, have you run a rating scan with Comodo firewall? It can help identify unknown programs on your pc, and you can decide whether or not to trust them. this helps the firewall to be more efficient.
Also, I recommend downloading and installing malwarebytes from here: http://www.malwarebytes.org/ Preform a threat scan, just to make sure your computer is clean.
Comodo firewall shouldn’t update unless there is a new version or a website filtering database available. Also there are known conflicts with viruscope, do you have that enabled? If so, try disabling it.
It’s probably because all these applications use the same port (port 80) to update.
Also, you are kind of low in RAM. You should stick with one vendor from my point of view.