Arma 2 & OH crash at start up

[Arma 2 & OH crash at start up]

hey Guys,

I just installed these games on my laptop and it keeps crashing.

i keep getting this error

Problem Event Name: APPCRASH

Application Name: arma2.exe

Application Version: 1.11.86.734

Application Timestamp: 4ed37db1

Fault Module Name: igdumdim32.dll

Fault Module Version: 9.18.10.3071

Fault Module Timestamp: 51493a7e

Exception Code: c0000005

Exception Offset: 0007f3b7

OS Version: 6.1.7601.2.1.0.768.3

Locale ID: 3081

Mp laptop specs are:

i7 363 2.40

radeon 7970

16 gig ram

any ideas how to fix this ?

thanks