No imposition at all, it's why we started the forums.
Most problems are similar and with this feedback, we can also improve the service so it's good to know when people are experiencing certain problems.
I know you said you checked the firewall and I still asked you to disable it but sometimes, it's worth doing the obvious to get some clues.
You mentioned seeing the rule, does it allow All? On my win7, this is what the rule looks like.
The OutagesIO agent only uses ports 80, 443 and some ICMP ports are one part of some tests to determine if there is an actual outages or not. It is completely safe to give it All access.
firewall-03.png firewall-02.png firewall-01.png