Windows 7: Win 7 64 Bit Appcrash on every game

Hey ho guys, well the title tells nearly everything about the problem I'm encountering. Since using Win 7, every game I start crashes after some time and produces the following:

Problemsignatur:
Problemereignisname: APPCRASH
Anwendungsname: AutoRun.exe_Bioshock 2
Anwendungsversion: 1.0.0.0
Anwendungszeitstempel: 4b078f7b
Fehlermodulname: StackHash_cdd5
Fehlermodulversion: 0.0.0.0
Fehlermodulzeitstempel: 00000000
Ausnahmecode: c0000005
Ausnahmeoffset: 9c37310c
Betriebsystemversion: 6.1.7600.2.0.0.768.3
Gebietsschema-ID: 1031
Zusatzinformation 1: cdd5
Zusatzinformation 2: cdd5441710770e008f579c17cd54c160
Zusatzinformation 3: 40fb
Zusatzinformation 4: 40fbe1ea5480e93b4dbfa372e47be59a




I already formatted the PC, but the problem goes on. I really need some help, I#m beginning to go mad.

- Win 7 Home Premium 64 Bit
- Intel i5
- Radeon 5850
- 8 Gb Ram

We really need the actual DMP file. use these to find and upload it to us. http://www.sevenforums.com/crash-loc...d-problem.html

From a quick look at the app crash I would suspect memory.

If in the interim you want to test yoour ram download memtestx86 and run it for 5 passes.

thanks

Ken

Okay then, first thanks for your assistance and here are my .dmp file and furthermore photos of my ram tests. I tried Memtest, which produced an error, afterwards i tried Memtest86, but my PC just hangs itself when i try version 3.4 or 3.5 multi core processor. When i run 3.5 on single core it jus starts, runs for a second, then my PC reboots. I't's just: Wtf??

About the .dmp file: does it just record bluescreens or getting thrown back to desktop,too? Cause I rarely get bluescreens, mostly just desktop with the crash message.