Equalizing the Sound Level
Right click the speaker icon and choose Open Sound Settings from the menu which appears.
Next click on Sound Control Panel – over toward the upper right :
Click Playback, Speakers, Properties.
Click Enhancements, Loudness Equalization, OK.
That is all. Now your playbacks should all have the same loudness!
Edit: Set the default to Realtek Digital Output, then run the troubleshooter and allow it to fix/re-install the driver.