Recently i had the problem of having no sound at all after updating to windows 10. I figured that i wasn't the only one with this problem. Solution: 1) Go to Computer Management >Device Manager. Go to v Audio -input and -output Press the arrow key. 2) you will now see 2 options, your internal Microphone (Conexant smartaudio HD) and your internal speaker/headphone (Conexant smartaudio HD) RIGHT CLICK BOTH OF THEM AND CLICK UNINSTALL (this should be option 3 when right click.) 3) Scroll down trough the Device manager list until you see v Audio, video and games Again, press the arrow key. 4) When you click the arrow key, you should be able to see 2 options, Conexant smartaudio HD AND NVIDIA High Definition Audio.
Realtek released the latest High Definition Audio driver one month ago before Windows 10 was released. Driver Sweeper Windows 10 there. The latest driver is compatible with Windows 10. Audio driver windows 10 free download - Windows 10, DL Driver Updater, Apple Safari, and many more programs.
Again, uninstall ONLY the Conexant smartaudio HD. Now you basically have no sound drivers on your computer left meaning you need to google and find the Conexant driver that belongs to your computer. BUT the drivers which your need to download HAVE TO BE for a lower windows. For example: i have a sony vaio with windows 10, i deleted my audio drivers and i reinstalled conexant drivers for windows 7.