I have a brand new Win 10 Home installation with the latest Comodo Firewall. The firewall keeps blocking useful apps, e.g. I had to turn it off to be able to update Steam or log into my Microsoft account.
I have it running in Safe Mode.
I am not having these problems on my desktop where Comodo Firewall is also installed (Win 10 Pro). It’s like the firewall is getting increasingly paranoid?
Just thinking out loud. Does Steam use peer to peer download? I recall it did that long ago but that may no longer be the case.
The Firewall logs will by default only show only today’s blocks. Try setting it to show this week. Can you check File List for Unrecognized files? Are there files related to Steam in that list? Select all Unrecognized and do a look up and see which ones have been moved to Safe Applications.
Can you post a screenshot of your Application Rules?
To take another angle. If you had other security programs installed in the past then there might be a left behind driver or service. When that happens it may cause instability or performance issues. Try running Eset’s clean up tool to remove possible left overs of previously installed security programs: [KB146] Uninstallers (removal tools) for common Windows antivirus software .
What security programs do you have installed alongside CIS?