Windows 7: Games are crashing

Hello, I don't what could be the problem but the games I have installed are crashing.
GTA San Andreas, CS Global Offensive Beta, and my bro said that NBA 2K12 is also crashing.

Could it be a hardware/software probllem?

GTA error:

Problem signature:
Problem Event Name: APPCRASH
Application Name: gta_sa.exe
Application Version: 0.0.0.0
Application Timestamp: 427101ca
Fault Module Name: gta_sa.exe
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 427101ca
Exception Code: c0000005
Exception Offset: 000dd5a3
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1071
Additional Information 1: d68b
Additional Information 2: d68bd3b8282f5e72182bbd7e42e4d6c7
Additional Information 3: 6c49
Additional Information 4: 6c49d494190589b8dc6d7b57ccb74dfb



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Hi Boshko, Is that the system your running on in your system specs below? How long before it crashes?

Yes, system specs are they.
How long, I don't know... I have this conf. for about week. They are crashing since they are installed.
I'm also playing CS 1.6, and while playing graphics is getting crazy...