I’ve been trying to update Comodo Firewall, but the cmdagent.exe copy never completes.
I’ve inactivated Avast for 10 minutes to accommodate this but it doesn’t complete.
Which version of Comodo Firewall do you currently have?
If you can’t get it to update then you can export your current configuration (so you won’t have to make all new rules), uninstall the current version, download the new version from the website, install that version, then import your old configuration.
Just be aware that importing a configuration from versions older than V5 are not recommended as the way that program works has slightly changed.