Repeated Game Crashes

[RedShift27]

I have been having issues with repeated game crashes in both GMOD 12 and GMOD 13 Beta. They seem to be fairly random where the game will just suddenly stop working. Here is the most recent crash report from my event logger.

[QUOTE]Log Name: Application
Source: Application Error
Date: 10/3/2012 3:34:06 PM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Description:
Faulting application name: hl2.exe, version: 0.0.0.0, time stamp: 0x50589428
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00000000
Faulting process id: 0x1024
Faulting application start time: 0x01cda1982186cbb3
Faulting application path: c:\program files (x86)\valve\steam\steamapps\jcc1999\garry's mod beta\hl2.exe
Faulting module path: unknown
Report Id: 4af6c1d4-0d91-11e2-bbb9-d4bed9a734e3
[/QUOTE]

Every crash log says the exact same thing.

And some info on my system

[QUOTE]Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1
Processor: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz (8 CPUs), ~3.4GHz
Memory: 8192MB RAM
Available OS Memory: 8174MB RAM
Page File: 2832MB used, 13514MB available
DirectX Version: DirectX 11

Card name: AMD RADEON HD 6450
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x6779)
DAC type: Internal DAC(400MHz)
Display Memory: 743 MB
Dedicated Memory: 1008 MB
Shared Memory: 3831 MB

[/QUOTE]

This is a practically brand new computer bought 6 months ago.

Any help you could provide would be greatly appreciated.

Thanks