I am having the same issue, my wife is using her computer and can connect to any server. i cannot connect to any hopefully someone can help! i have done everything you have with zero success.
EDIT: IMPORTANT!!
check your vpn, i turned mine off [nortan turned it to auto on my last update]
i have been able to access all servers on dayz and other games: hopefully this helps as i was about to give up and i tried this.