I actually faced a similar issue with a CMI8738 sound card on Windows 10 some time ago. What finally worked for me was trying a driver that wasn't the latest version. Sometimes older drivers can be more compatible, especially with hardware that Windows 10 doesn't natively support well.
You might want to visit the manufacturer's website first to see if they offer any official drivers tailored for Windows 10. If that's not helpful, some users have found success with third-party sites like DriverGuide, though you have to be cautious and ensure you're downloading from a reputable source to avoid any malware.
Another thing to consider is checking Windows Update after installing the driver—sometimes Microsoft will have a more compatible driver that will update automatically.
After you have the driver installed, go into the Sound settings in Windows and make sure the CMI8738 is set as the default device for both playback and recording. You can also tinker with advanced properties within those settings to adjust the bit rate and sampling rate, which can sometimes improve performance or compatibility.
If the sound is not quite right, try adjusting these settings one at a time to see if it makes any difference.
A question that might help guide more advice: Are you facing any specific error messages during installation, or does it just hang/lag? That might provide clues to what's going wrong and help pinpoint a solution.