Windows 11 often defaults to "Speakers (C-Media Audio)" but the CMI8738 may have multiple outputs: Front, Rear, Center/Sub, SPDIF. Right-click the speaker icon > Sound settings > More sound settings (under Advanced). Right-click each C-Media output and select "Test" until you hear sound.
If you get error "The driver is not intended for this platform," you need to manually edit the .INF file (see Method 3). 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. Cmi8738 Driver Windows 11 64 Bit
Join the VOGONS community thread to share your success or ask for specific .INF edits for your card's unique hardware ID. Word Count: ~2,200 words. Last updated for Windows 11 24H2 (2026). Windows 11 often defaults to "Speakers (C-Media Audio)"
You may see a list: "C-Media CMI8738/C3DX PCI Audio Device". Select it. A warning will appear: "This driver is not digitally signed" or "This driver may not be compatible" . Click Install anyway / Yes . If you get error "The driver is not