All source games crash to desktop to with this

[Gavain788]

'The Instruction at 0x####### referenced memory at 0x#######. The memory could not be 'read'
Please help. I just want to play some games.

Processor Information:
    Vendor:  AuthenticAMD
    Speed: 2611 Mhz
    1 logical processor
    1 physical processor
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Unsupported
    SSE42:  Unsupported
    
Network Information:
    Network Speed:  
    
Windows Version:
    Windows XP (32 bit)
    NTFS:  Supported
    
Video Card:
    Driver:  NVIDIA GeForce 7800 GTX (Omega 2.169.21) 
    DirectX Driver Name:  nv4_disp.dll
    Driver Version:  6.14.11.6921
    DirectX Driver Version:  6.14.11.6921
    Driver Date: 5 Dec 2007
    Desktop Color Depth: 32 bits per pixel
    Monitor Refresh Rate: 60 Hz
    DirectX Card: NVIDIA GeForce 7800 GTX (Omega 2.169.21) 
    VendorID:  0x10de
    DeviceID:  0x91
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    No SLI or Crossfire Detected
    Primary Display Resolution:  1280 x 1024
    Desktop Resolution: 1280 x 1024
    Primary Display Size: 14.96" x 11.97"  (19.13" diag)
                                            38.0cm x 30.4cm  (48.6cm diag)
    Primary Bus: PCI Express 16x
    Primary VRAM: 256 MB
    Supported MSAA Modes:  2x 4x 

    
Sound card:
    Audio device: SB Live! 24-bit
    
Memory:
    RAM:  2047 Mb
    
Miscellaneous:
    UI Language:  English
    Microphone:  Not set
    Media Type:  DVD
    Total Hard Disk Space Available:  476929 Mb
    Largest Free Hard Disk Block:  433676 Mb
    Steam Hard Disk Usage:  27513 Mb
    OS Install Date: Nov 23 2009
    Installed Packages: Firefox,Windows Firewall

 

[FishBulb]

The Instruction at 0x referenced memory at 0x The memory could not be read

 

[Gavain788]

Ive already tried all those. ;(

 

[Gavain788]

I think reinstalling steam fixed it. Thanks for the help though bro.

 

[Gavain788]

Nevermind. Still broken. I did get a memory could not be written error though.

 

[Hectic Glenn]

I see you're using omega drivers, is that in part due to you trying to fix the problem or do you always use them?

Have you tried the latest nvidia drivers?

 

[Gavain788]

The problem with nvidia drivers is that with my graphics card it changes the resolution and stuff to 4-bit and like 640x480. When I try to change it to 32-bit it wont change. It use to work but then someone said to download omega drivers but then when I tried to go back it did the 4-bit thing. But I was having problems before I had omega drivers but I think they were different? So maybe that would fix it getting offical Nvidia drivers.

 

[Destructo-Bot]

Source doesn't play nice with background processes. When I had Process Priority Saver installed it would cause TF2 and L4D to BSOD upon loading, but only every couple of loads (sometimes they'd load and play fine, sometimes it would immediately BSOD).

So try a clean boot where you aren't running anything other than windows services and processes and see how the game runs. Then do process of elimination if that fixed your problem.

 

[Gavain788]

Last time I tried clearing all my startup shit except windows stuff I couldn't start my computer so I had to restore previous settings.
Right now obvious programs are Freeram XP Pro and Avast also rocketdock.