I searched but didn't find results to the same issue I am having, I never had this issue before but it started up last week. After playing STO for a short time regardless of what I am doing in game it causes everything else to disconnect.
Nothing will work such as Steam, Skype, Firefox, or Chrome and even the STO in game chat system is "offline" but I can still do STFs just fine. If I close the game everything else comes back on and is just fine but will then occur again if I chose to play again, and of course I am going to do that.
Does anyone else seem to have this issue or know how to solve it?
TLDR: Run STO for a bit, everything else gets block off the internet but STO (Chat goes offline). Close STO everything works again.
Edit: An update, it started to happen to other games and after while I learned it was Skype of all things. In case someone else has this issue and googles it this was my solution.
Skype > Options > Connection > uncheck "Enable uPnP" and uncheck "Use port 80 and 443 for additional incoming connections"
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