The card you're using is an Asus Xonar DX, correct? You've never actually said anywhere in the thread what it is, so I just want to make sure. The C-Media 8788 DSP chip is used in Asus's Xonar series, and they would likely be providing a Windows 10 version of their driver directly to Asus. Assuming I have your card right, try the official Windows 10x64 drivers.
Windows 10 - 64 bit version 8.1.8.1823 (for Asus Xonar DX)
