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GPU Optimization

How to Fix NVIDIA Code 43 Error on Windows 10/11

Is your system throwing NVIDIA Code 43? Follow this quick, zero-fluff guide to resolve the issue completely using terminal commands and system configurations.

What Is NVIDIA Code 43?

“Windows has stopped this device because it has reported problems. (Code 43)” appears in Device Manager when the NVIDIA driver fails to initialize the GPU. This is not a hardware failure in most cases — it’s a driver-level communication breakdown between the OS and the GPU firmware.

Common Triggers:

  • Failed or partial driver update
  • Windows Update installing a generic Microsoft Basic Display Adapter driver
  • BIOS/UEFI disabling the discrete GPU after a power event
  • Conflicting GPU entries in the registry

---## Step 1: Fully Purge Existing NVIDIA Drivers

Download and run Display Driver Uninstaller (DDU) in Safe Mode:

  1. Download DDU from guru3d.com
  2. Boot into Safe Mode:
bcdedit /set {current} safeboot minimal
shutdown /r /t 0
  1. In Safe Mode, run DDU and select Clean and restart
  2. After reboot, disable Safe Mode:
bcdedit /deletevalue {current} safeboot
shutdown /r /t 0

---## Step 2: Install the Correct NVIDIA Driver

After DDU cleanup, install a clean NVIDIA driver:

  1. Go to nvidia.com/drivers
  2. Select your exact GPU model, OS version, and download type (Game Ready or Studio)
  3. Run the installer with Custom > Clean Installation checked

Critical: Do NOT let Windows Update install a GPU driver automatically. Block it with:

reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate" /v ExcludeWUDriversInQualityUpdate /t REG_DWORD /d 1 /f

---## Step 3: Verify GPU Status in Device Manager

Open Device Manager and check the GPU status:

devmgmt.msc

Expand Display adapters. Your NVIDIA GPU should appear without any yellow warning triangle. Right-click → Properties → confirm “This device is working properly.”

---## Step 4: Confirm via NVIDIA-SMI

Open a terminal and run:

nvidia-smi

This should output your GPU name, driver version, CUDA version, temperature, and utilization. If it returns an error, the driver installation did not complete — repeat from Step 1.

---## Step 5: Stress Test

Run a brief GPU stress test to confirm stability:

  • Use FurMark or Unigine Heaven for 10 minutes
  • Monitor temperatures with nvidia-smi -l 5 (updates every 5 seconds)
  • If temperatures exceed 90°C or the driver crashes, investigate thermal paste or cooling

Pro Tip: If Code 43 returns after sleep/hibernate, disable GPU power management in the NVIDIA Control Panel under Manage 3D Settings → Power management mode → Prefer maximum performance.