Some other tips that can help to solve the no audio problem:
- In the Device Manager right click and disable your audio. Then right click and enable it.
- Plug in external stereo speakers to the stereo jack. Windows detects whether anything is plugged into the stereo jack. After recognizing the speakers, it should install the driver.
- Re-install the driver in the Safe mode.
More:
Missing sound recording option "Stereo Mix" / "Record What you hear" / "Waveout mix"