Hi Shodan2k,
Sorry if that didn't work. I found a thread from another forum that suggests installing Icaros which supports webp as well. You can uninstall the codec I suggested earlier then install it instead. Before installing, I suggest you clear the thumbnail cache first using Disk Cleanup.
https://m.majorgeeks.com/files/details/icaros.html
Source:
https://www.reddit.com/r/Windows10/comments/d1o...
(Disclaimer: These are non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.)