Launching the game and quitting with mistake

[Scandity 10]

Hey,

I've installed Arma2 and A2 OA

A2 is working correctly (even tried to join a server)

After that tried to start OA, ticks are coming, game tries to start, black screen then the game wuit with a error message and searching for a solution.

I've become abit confused since A2 is running fine but OA isnt. Redownloading it didnt help, starting as admin and comp. on win7 didnt work too...

Some facts:

Intel Graficcard

8gb Ram

(Battlefield 4 is also running on thos laptop, so I am just wondering^^)

Error message of the rpt which I dont understand:

=====================================================================

== C:\Program Files (x86)\Steam\steamapps\common\Arma 2 Operation Arrowhead\ArmA2OA.exe

== "C:\Program Files (x86)\Steam\steamapps\common\Arma 2 Operation Arrowhead\ArmA2OA.exe"

=====================================================================

Exe timestamp: 2013/12/08 23:44:44

Current time: 2013/12/09 01:34:15

Version 1.62.95248

=======================================================

-------------------------------------------------------

Exception code: C0000005 ACCESS_VIOLATION at 5D29DA35

Version 1.62.95248

Fault address: 5D29DA35 01:0002CA35 C:\WINDOWS\SYSTEM32\igdumdim32.dll

file:

world: Desert_E

Prev. code bytes: F7 DE 1B F6 23 75 A8 69 F6 D0 00 00 00 03 77 48

Fault code bytes: 83 7E 14 02 75 30 8B 45 AC 8B 40 2C A8 04 74 04

Registers:

EAX:00000000 EBX:00000000

ECX:132F0A28 EDX:018CF290

ESI:00000000 EDI:132F0A28

CS:EIP:0023:5D29DA35

SS:ESP:002B:018CF1C8 EBP:018CF240

DS:002B ES:002B FS:0053 GS:002B

Flags:00010246

=======================================================

note: Minidump has been generated into the file C:\Users\Fynni\AppData\Local\ArmA 2 OA\ArmA2OA.mdmp

Thanks for help! :) (I am german, so you can even try it on that way ;) )