> Do you still have Code 39? When you do, in DevManager right click the device->Properties->Details tab. Use the pulldown and look if either Class uppper filters and/or Class lower filters exist. If yes, then post their values.
> Which version of the audio driver do you currently have installed?
Again, right click to Properties->Details tab
- Use pull down menu to look for two items: inf name and something like matching device id. Post the result
- Windows renames the original INF to oem.nnn. We want the original name. From command prompt
The output shows oem vs. original filename pairs. What's the original filename of the INF used to install your Realtek audio driver?
disk /online /get-drivers