Its working fine with windows 8.1 64bit . Dont need enable driver enforce when you restart computer.
Step 1 : Copy file RTKVHD64.sys ( Driver mod ) to folder Vista64 in orginal driver .
Step 2 : Enable Driver Signature Enforcement
Step 3 : Setup Driver from step 1 , Dont Restart .
Step 4 ...
I only get 2.0 channels on Naruto.Shippuden . DDL not working in cutscene of many games . In Lords of shadow , Front channels was wrong with Rear channels .
1. Don't startup Realtek HD audio
2. Rename RtkAPO64.dll in system 32
3. Copy and replace RtkAPO64.dll mod to system 32
RtkAPO64.dll mod https://www.mediafire.com/download/5jupipk2brzpurp/RtkAPO64.dll
4. Change formats in sound system to enable DTS