Try the following troubleshooting:

1. Make sure your earbuds have enough power before resetting them:

 - Place the earbuds into the charging case and keep the case open. 

 - Press and hold the button on the charging case for 10 seconds until the 3 LED indicators on the charging case flash white 3 times and then flash white in sequence continuously. This confirms that the reset was successful.       

2. Clear all the pairing records on your Windows computer and re-pair your earbuds. Make sure you choose the right mode (For audio/video, choose Stereo, and for mic choose Hands-Free)

3. Turn up the volume of your computer, earbuds and music/video to the maximum.

4. Use a Q-tip with a bit of rubbing alcohol to gently clean the metal mesh filter under the rubber ear tips.