Maybe check to see it is allowed through your firewall and an exception in your antivirus solution--I know I ran into that just a bit ago and I had to reinstall it as well...
Just when I get used to having STO back on my pc after going through the WinXP->Win8 debacle then the server decides to up and kick the bucket?! Only after I go through all the effort of coming up with a creative Klingon/ship name, gaining several levels, then going into the "unknown" sectors after several successful…