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Cmi8738 Driver Windows 11 64: Bit

The Ultimate Guide to the CMI8738 Driver on Windows 11 64-Bit: Installation, Fixes, and Legacy Sound

3.2 Generic Microsoft UAA (Universal Audio Architecture) Driver

  • Method: Force install "High Definition Audio Device" or "Audio Endpoint" generic driver.
  • Result: The device will not initialize. No sound output.

Method 2: Disable Driver Signature Enforcement (For Code 52)

Windows 11 blocks drivers that aren't digitally signed by Microsoft. The CMI8738 drivers are not. If you see Code 52 in Device Manager, you need to disable this security feature.

How to do it (Temporary – for one boot): Cmi8738 Driver Windows 11 64 Bit

  1. Hold Shift while clicking Restart from the Start Menu.
  2. Go to Troubleshoot > Advanced Options > Startup Settings > Restart.
  3. Press 7 or F7 to select "Disable driver signature enforcement."
  4. Windows will boot. Now install the driver via Method 1.

Permanent (Not recommended for security, but works): Run Command Prompt as Administrator and type: bcdedit /set testsigning on (This puts a "Test Mode" watermark on your desktop.) The Ultimate Guide to the CMI8738 Driver on

🛠️ Troubleshooting

| Issue | Fix | |-------|-----| | No sound after install | Set as default device: Right-click speaker icon → Sounds → Playback → Right-click CMI8738 → Set as Default | | Crackling/popping | In driver properties → Advanced → Set default format to 16 bit, 48000 Hz (DVD Quality) | | Driver reverts after reboot | Use Group Policy or Windows Update Show/Hide tool to block automatic driver updates | | Still not working | Card may be too old for modern PCI slot (PCI vs PCIe). Use a PCIe to PCI bridge card or external USB sound card instead | Method: Force install "High Definition Audio Device" or

2.2 Hardware ID Recognition

When a CMI8738-based card is installed in a Windows 11 machine, Device Manager will show:

  • "Multimedia Audio Controller" with a yellow exclamation.
  • Hardware IDs (example):
    • PCI\VEN_13F6&DEV_0100 (CMI8738)
    • PCI\VEN_13F6&DEV_0101 (CMI8738 with SPDIF)

Security and safety

  • Download drivers only from trusted vendor sites when possible.
  • Scan downloaded files with antivirus.
  • Prefer digitally signed drivers to avoid disabling signature enforcement.

Part 3: The Community Fix – The Modified "C-Media 8738 Generic Driver"

Because the official driver method is unreliable and requires disabling security features, the retro-computing community has created a modified driver that works natively on Windows 11 64-bit. This driver is unsigned but uses a known exploit to load without disabling signature enforcement permanently.

Issue 3: Driver Not Loading After Reboot (Code 52)

  • Cause: Windows 11 re-enforces driver signature after a standard reboot if you used Method 1.
  • Solution: Use the modified driver from Part 3, or permanently disable driver signature enforcement (not recommended for security) via bcdedit /set testsigning on (adds a watermark).
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