You do not need frequent updates for a legacy PCI sound card. C-Media released its last official driver for the 8738 series in 2010. However, community-modified drivers exist for Windows 10/11.
Restart: Always restart your computer after the installation is complete to initialize the new driver. Troubleshooting Common Issues Ezhou Pci Sound Card Driver Downloadl
For , the last stable Windows driver (for Win7/8/10 32/64-bit) is version 7.12.8.1740 . For Windows 10/11, the inbox driver works but disables 4-speaker mode unless you force-install the C-Media driver manually. You do not need frequent updates for a legacy PCI sound card