@beck
If you go to my forum post here: http://steamcommunity.com/app/221100/discussions/1/35221031713912949/#p4
You can see someone say that they tried ArmA III and it also has the same problem (page 4). I would try it myself but I have no interest in ArmA III nor II, I own both but this is why I assumed this hardware denial because not too long ago they also made it so all BattlEye bans are global meaning if you were banned in ArmA III then you are also banned in DayZ AND ARMA II, basically every game with BattlEye...
EDIT* PaFFi can confirm this it seems...
P.S By that (global BattlEye) I don't mean people are banned but perhaps there was some kind of fluke/mistake...

@g0r86
Thing is though, it may be hardware related but it's not because you're hardware has gone bad, they (BatllEye) most likely made the hardware you have incompatible or somehow gave a specific amount of people some sort of hardware ID denial/ban? IDK, all I know is every other game I own works perfectly online and I have no internet nor ISP issues... That being said, you yourself, have even gone far enough as to re installing W7 onto your computer and trying it then but the problem persists.

Yup same problem and nothing seems to be working, fresh install, port forwarding, disabling firewall, restarting router/modem, re installing steam, running as administrator, re installing BattlEye, running with DEP ON or even restarting your computer will not resolve this and I don't know what the hell is. I've tried everything, game is unplayable because it's exactly 15 minutes into a game and it loses connection and the only workaround is to disconnect before it happens but if you do that you'll have to disconnect once more at every 15 minute interval... It's definitely a server sided issue with BattlEye as it all spontaneously began happening around the same time (night of 8/16/14) for a handful of people. I'll upload my dxdiag and files anyways but I don't see what they will help you with as it's nothing to do with my computer.