Hi. I have this trouble where my ARMA3 will freeze when I join a multiplayer server. and when it freezes it normally takes down other applications using internet also.

Like steam, skype, chrome.
All those stops responding.
and sometimes I even have to restart the computer to get it functioning alright again.

I thought for a while that It might have been my router being to old or something.
So I bought an pretty expensive new one, which didnt fix the problem Im having.

Please help?