Great!
I hate reading through a technical thread where the problem is presented and then people go on to cheer it's solved! But no answer is given lol.
Therefore, in case it helps:
We just performed a number of system checks to make sure the 64bit can run. Then applied some tips to help better connection to servers with large amounts of people.
We unfortunately did not narrow down the problem as it could have been a number of things that got it working.
-Make sure your "Processor" can handle 64bit, usually found under Instruction Set.
-Make sure your operating system is running in 64bit.
winkey+r [ or Run command], Dxdiag (enter) , the diagnostic tool pop up will tell you your system specs and help you with info needed.
Further search internet for more specs or use cmd.
-Turn on the 64bit in arma launcher, reinstall is not needed.
Parameters > All Parameters > Platform: Default (64-bit)
~Turn everything off in parameters, it's not needed. And all the fruit will slow you down.
it can of course still be used though best to have a reason, otherwise i advise its slowing you down.
~Turn settings to bare bones. Or Lower them etc. Sometimes until you get a good PC this is how your potato should run. As long as you have the basics, Game Mechanics a way more fun than graphics, look at Mount & Blade.
~Use the Teamspeak trick of Tools > Options > Chat > Maximum number of lines: 10 lines , you can always turn it back to desired when done with gameplay.
as Teamspeak plays a part in your connections this can greatly help.