server connecting error in battlefield 3

Try this....

Run the game as Administrator:
Go to the Origin games folder (C:\Program Files (x86)\Origin Games\Battlefield 3) and find Bf3.exe. Right click it and go to PROPERTIES, then COMPATIBILITY and check the box next to RUN THIS PROGRAM AS ADMINISTRATOR.
Do the same with BF3_x86.exe as well.

Run Origin as Administrator:
Go to C:\Program Files (x86)\Origin and right click on Origin.exe and go to properties. Then go to compatibility tab and check the box next to RUN AS ADMIN.

Disable Origin in game:
In Origin - Application settings - Origin in Game - disable Origin in game

Origin Cloud Storage turn it off
Origin, settings, General

Make Sure BF3 is set to 64bit if your windows is 64bit
1- open origin and go to My Games
2-Right click BF3 and go to Game Properties
3-Under when launching this game set it to x64 and check off disable origin in game.
4- Hit apply and test you BF3

Another thing that may be worth trying: run a Clean Boot: http://help.ea.com/en/article/how-to-clean-boot-your-pc/
This should ensure that no programs are interfering in the background.

Disable Mantle if you have it and try Direct X, Turn OFF Anti-Aliasing Deferred in video card settings in game. If you have page file turned off then turn it back on as this can make errors even with 32gigs ram.

Others have said if they uninstall MSI Afterburner issues / crashing is stopped. So if you have this installed remove program and test BF4. Also look at other programs as Fraps,EVGA Precision, Geforce experience, be sure to turn off the streaming function that is enabled by default ,Raptr, RivaTuner , ASRock eXtreme Tuner, Steam, Skype, aero ,Overwolf extra program in teamspeak and xfire are known to make issues as well. And I am sure more programs not in my list yet turn one off at a time and test BF4. Since last patch more programs now give issues :/

Uninstall the HD Audio Driver from the video card driver install add/remove programs. This silly thing makes issues in BF3 for some. Reboot then repair BF3 to be safe.

If all this fails to fix it then try this...

BF3 folder in my documents holds game configs and screen shots even if BF3 is installed on different drive. When you uninstall BF3 it does NOT remove this folder. So when you install the game again you can still have the same issues. Even if its not a new install it is still worth trying as the game cfg could be mucked up.

1- Go to my Documents and remove BF4 folder place it on your Desktop or trash.
2- Be warned you do have to set up your in game settings again.
3-Repair BF3
4- When done go test your game. If it fails reboot your PC and run repair game again and test BF4.