Thanks for the reply and sorry for the inconvenience. Installing the Windows 10 Fall Update may fix your problem. Groove only uses the standard Media Foundation codecs from Microsoft that come with Windows 10. K-Lite (and other packs as well) use a whole different type of codec (DirectShow) then what Groove uses. In any case, I can't explain it, but VLC is working now with my flac files. K-Lite is not responsible for your problem. I didn't think that was necessary, but maybe it was. In doing my earlier tests, after I clicked 'save' in VLC for the audio setting changes I didn't exit the program and restart it, which perhaps was necessary before the new settings would take effect. It might have been putting the speakers as 'default' in control panel sound, although I had been choosing them specifically the audio dropdown menu in VLC, so that should not have mattered. Maybe something I changed did the trick, but I don't know what it was. I had continued to play around with some settings to no avail. To be sure of 圆4/64-bit or x86/32-bit, press Windows Flag + Pause/Break and take a look at the System type: section.
I had already restarted the laptop earlier, as was recommended by some posts, with no luck. I was getting ready to prepare the requested info, and for some unknown reason the flac files started playing, using both download VLC and Windows 10 app store VLC.