When I first upgraded to W10, File Explorer worked as it did in W7. Now when I open it I see a blank preview section and the forever expanding green ribbon in the ribbon bar. I tried checking Always show Icons, never thumbnails and the green ribbon finally finishes. But not being able to see picture thumbnails is a pain. I turned thumbnails on for the Pictures folder only and the never ending green ribbon is back. Possibly a related problem: with thumbnails off (or on) if I left click on a video file in the Videos volder, file explorer hangs and I have to end it with Task Manager.

I have heard that by ending the dllhost.exe process/service, the green ribbon goes away, but so does W10 security and stability.

Suggestions on how to fix are appreciated.

Without a properworking File Explorer, W10 is not really a suitable OS.