I had the same problem,
What's happening is that the Windows update service is updating your driver to the latest Realtek 6.0.1.7xxx. The latest driver has the irritating EU safety warning.
Solution:
Download 6.0.1.6699 (for instance, worked for me):
Then follow this tutorial which shows how to block hardware updates, inspecific the Local Policy Group Editor:
http://www.makeuseof.com/tag/take-back-control-driver-updates-windows-10/
It should be relatively straightforward, but just to add:
Right click on the Realtek Audio device, under Sound video, audio and game Drivers in Device Manager.
Then go to Hardware IDs, copy and paste the two (or more IDs) into Local Policy Group Editor.
- Make sure to get the Hardware ID before uinstalling Realtek 6.0.1.7xxx, save them in a txt file.
- Uninstall Realtek, restart computer
- Reinstall Realtek 6.0.1.6xxx, DO NOT RESTART!
- Then Paste in the hardware IDs and enable Local Policy Group Editor. Now you've locked 6.0.1.6xxxx
- Restart Device
- Enjoy
Hope that works!