app crash

hi guys i need some advice please i have windows 7 ultimate 32 bit and all the games crash or just freeze . this is only one exemple Problem signature:
Problem Event Name: BEX
Application Name: ACRSP.exe
Application Version: 0.0.0.0
Application Timestamp: 4eca2ca5
Fault Module Name: StackHash_0a9e
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 00000000
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

EzioAuditore said:

Have you tried updating the graphic card's drivers and re-installing the game (ACRSP.exe seems to be assassins revelations game ) ? Is it legally purchased or downloaded off the internet?

i update the graphic card's drivers and reinstall the game and nothing the same problem. and not only whith assassins creed i have this problem whith all the games-battlefield, call of duty( thier are downloaded from internet but same of this games worked before on my pc)