Comodo Internet Security is a security suite, meaning it has both a firewall and an antivirus program in it. If you are running both Comodo Internet Security and Avast, you have two antivirus programs running, and you need to uninstall one of them.
The problem with your wife's connection is likely a firewall program. She will need to talk to the IT department at the community college and ask them for instructions. But first, try uninstalling Comodo and see if you still have the same problem. Comodo has a standalone firewall which is very good here: http://www.personalfirewall.comodo.com/dow...d_firewall.html
Let me know if this helps.