I have a Lenovo Thinkpad T430s which started having a problem with audio, but only when on Internet sites.
If music or video's are played from the C-drive, the audio is fine.
When the user tries to watch a YouTube video, or other audio related URL using Internet Explorer 11....nothing.
Other users with the same model laptop and using the same proxy to access the internet are not having this issue.
Check sound / audio settings in Control Panel, services, and toolbars, and everything looks normal.
Any ideas are appreicated. thx