BSOD after playing APB, 0x000000C4 and 0x0000004E

I got the PFN corrupt while playing APB: Reloaded

got the other two crashes after using driver verifier

also BSOD before playing BF4

Your crashes were all caused by the Nvidia driver, GeForce Experience was also involved. Please do a clean install of the latest Nvidia driver (332.21) but be sure that optional components such as ShadowPlay, Nvidia Update, the 3D stuff and GeForce Experience are not selected for installation.

Test your RAM with Memtest86+ and stress test the CPU with Prime95. Post back with your results.

Just uninstalling nvidia drivers and then using driver sweeper

I'll run prime95 tonight

Can I use Windows Memory Diagnostic instead? Got no USB or CD to boot from

The symptoms are:
A flickering creen.
A frozen screen.
The screen is totally black.
A blue screen of death with the "Nvlddmkm.sys error message".

Solution

Step 1

Go to the NVIDIA folder:

C:\NVIDIA

Look for the file named as "nvlddmkm.sy_" (C:\NVIDIA\DisplayDriver « version number of driver (example : 186.81) » InternationalDisplaynvlddmkm.sy_ )

Note that: The location of this file may vary depending on the OS used.

Copy the file at the root of C: C:\nvlddmkm.sy_

Step 2

Go to the system folder where the drivers are stored :

C:\Windows\System32\drivers\

Once in this folder, locate the the "nvlddmkm.sys" file and rename as it "nvlddmkm.sys.old"

Step 3

Open the command prompt:

Press Windows key + R and type "cmd"

Type the following commands:

"cd" and press the Enter key.

"expand.exe nvlddmkm.sy_ nvlddmkm.sys" and then press Enter

This command allows you to unzip the nvlddmkm.sys file- previously saved at the root of C and thus creating a new instance of the file.

Copy this file to C:\WindowsSystem\32drivers
Restart your PC

Chex31 said:

Just uninstalling nvidia drivers and then using driver sweeper

I'll run prime95 tonight

Can I use Windows Memory Diagnostic instead? Got no USB or CD to boot from

Memtest86+ requires a bootable media, at most you'll need an USB drive. The built-in memory diagnostic tool isn't as reliable as memtest. You may run it but I doubt it'll pick up anything.

richardsk said:

The symptoms are:
A flickering creen.
A frozen screen.
The screen is totally black.
A blue screen of death with the "Nvlddmkm.sys error message".

Solution

Step 1

Go to the NVIDIA folder:

C:\NVIDIA

Look for the file named as "nvlddmkm.sy_" (C:\NVIDIA\DisplayDriver « version number of driver (example : 186.81) » InternationalDisplaynvlddmkm.sy_ )

Note that: The location of this file may vary depending on the OS used.

Copy the file at the root of C: C:\nvlddmkm.sy_

Step 2

Go to the system folder where the drivers are stored :

C:\Windows\System32\drivers\

Once in this folder, locate the the "nvlddmkm.sys" file and rename as it "nvlddmkm.sys.old"

Step 3

Open the command prompt:

Press Windows key + R and type "cmd"

Type the following commands:

"cd" and press the Enter key.

"expand.exe nvlddmkm.sy_ nvlddmkm.sys" and then press Enter

This command allows you to unzip the nvlddmkm.sys file- previously saved at the root of C and thus creating a new instance of the file.

Copy this file to C:\WindowsSystem\32drivers
Restart your PC

That won't help, if the kernel mode driver was corrupt it wouldn't even load in the first place. What we're looking at here is "STOP 0x000000C4: DRIVER_VERIFIER_DETECTED_VIOLATION" triggered by GeForce Experience which in turn crashed nvlddmkm.

Besides, a clean driver installation eliminates any leftover versions of nvlddkmkm.sys.