I have 2 Windows 10 (1703) Professional computers (Dell Inspiron 3668) with a very strange issue. There is a red X on the speaker down by the clock... When I click on it Windows Troubleshooter says no speakers are plugged in... they are... Windows does not even see the internal speaker... I have removed and installed the Reltek driver.... I even went as far as to do a clean reinstall of Windows on one of the PCs... I would think it is a hardware issue but I have multiple computers with the same issue... All help is much appreciated