Click the Advanced tab and uncheck the Enable audio enhancements checkbox.Click the Playback tab, right-click your default audio device, and select Properties.Launch the Control Panel, go to Hardware and Sound and then click on Sound.Disable them and check if you can share system sounds on Skype. Sometimes, audio enhancements can cause various audio glitches. Restart your machine to install the latest driver version and repair corrupted drivers.
Your computer will automatically uninstall your audio driver.
You can’t access it as a stand-alone option. ⇒ Note: The Share System Sound option is only available when you’re sharing your screen.