Repairing your Realtek Audio Manager can solve this issue for you. Follow these steps to fix it by yourself.
1. First, Press Windows Key + R
2. A dialogue box will pop up, then appwiz.cpl and press the Enter key.
3. Search and choose the Realtek Audio Manager
4. Click on Repair and follow the prompts on your screen
5. And, now reboot your device and the issue should be gone