Support sent me to this site.

Tried it, didnt work. Think its the same like the starting options in steam.
I tried many of those starting options, memory usage, cpu usage and many more.
Nothing worked.
To be sure i did it right i made a screen shot.

Files are up

It says that arma3.exe and arma3diag.exe have to be started with DEP.
And i cant disable DEP completely in the Command Prompt. It says its needed for save start and cant be disabled.

I tried verifying the integrity of the game cache. It always says one file is damaged and needs to be downloaded. I can do this several times, doesnt change anything.

Have a nvidia geforce gtx770m on my board too. I disabled the intel onboard card in the device manager once. But then i cant run any game with fps over 10. Looks like they need each other.

Dont know what BEX and DEP is.

That was a good idea.
Look what it says:

EventData

arma3diag.exe 
1.23.125.390 
53a9fdc4 
IPHLPAPI.DLL_unloaded 
3.0.2.0 
5392abda 
c0000005 
000304d3 
fbc 
01cf9151392b1a46 
D:\Program Files (x86)\Steam\SteamApps\common\Arma 3\arma3diag.exe 
IPHLPAPI.DLL 
77d7f946-fd44-11e3-bea0-0c8bfd8e83dd

and after the error theres a message:

EventData

   81681304823 
   5 
   BEX 
   Nicht verfügbar 
   0 
   arma3diag.exe 
   1.23.125.390 
   53a9fdc4 
   IPHLPAPI.DLL_unloaded 
   3.0.2.0 
   5392abda 
   000304d3 
   c0000005 
   00000008 
    
   C:\Users\Phillip\AppData\Local\Temp\WER99E1.tmp.WERInternalMetadata.xml 
   C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_arma3diag.exe_3f44a63b626524eada2a57ad3d41183afef3b3_4084cbec_17bb9fd 
   0 
   77d7f946-fd44-11e3-bea0-0c8bfd8e83dd 
   0 
   225dcaed1411cf0d226bc2f4a37493f3

Something is wrong with the IPHLPAPI.DLL
The support told me, that there was something wrong with it.
But i dont know what to do with it.