I have been having problems with connecting to online servers since I switched to Win 8.1 about 2 to 3 weeks ago.
When I start Arma 3 and tries to join a multiplayer server, usually Altis Life, I get into the lobby and usually can choose a team and then I start loading the multiplayer files, my arma just crashes.
Arma 3 is not responding bar comes up for a sec then it just says that Windows was unable to fix the problem and shuts Arma down.
Sometimes, it just happens 3 to 4 times until I get on the server and can play without problem, and sometimes it takes more time.
It does not happen, however, when I play offline. Scenarios or Boot Camp for example. It is only on Multiplayer it happens.

I have tried to delete the .dll files in the dll folder.
I have verified game cache on Steam.
I have started Steam as an Admin.
I have restarted my computer.

Sometimes it works directly. Sometimes it takes a long while.
I think I have uploaded the crash log of the most recent crash. {F24739} {F24740} {F24741}