Can't preview jpg files in the preview pane -- Windows 10 Fall Update (1709)

I'm still living this nightmare since the last Windows update!!  This is unbearable, as I am a graphic designer and 95% of my work involves images . . . images that have nondescript names . . . images that I now have to open to even see IF it's the file I'm looking for.  Something that used to take seconds now can take 15 minutes or more.  That is when I don't become disgusted and just quit the project or take a 2-hour detour into the internet realm to try to find a fix for this problem. 

Why is Microsoft not responding or issuing a fix for this?

HELP!! ANYBODY!! PLEASE!! IS ANYBODY OUT THERE WHO KNOWS HOW TO FIX THIS??!!!!

And the usual things have all been checked and/or done to no avail.

• The "always show icons . . . " button is unchecked

• I have run the Disk Cleanup with "Thumbnails" only checked (several times)

This totally worked . . .

The problem for me is that I literally have 641 folders and 20,000+ files. I just cannot manually do this for this many images!

@Tara_620

If copying and moving a .jpg gets your preview back that sounds like Win10 may need reminding what creates the preview.

I would try changing the default program to open a .jpg to be the Microsoft Photos app.

Once that has locked in and double-clicking a jpg file opens it in Photos; try changing the default back to Photoshop or whatever you normally use for editing. It may take a while for this to lock in fully if you have that many stored jpg files on your drive.

That change of program ownership may be sufficient to change the attributes stored within the registry to bring back the preview.

I finally fixed it!!

Since OneDrive was mention in other replies and I too use OneDrive, I went into OneDrive and unchecked "Save space and download files as I need them".  As soon as I did that (no restart needed), the thumbnails loaded for every image in every folder!!

Can't believe it was that simple, yet the Microsoft Team couldn't/didn't figure it out and post the fix on any of the 50 or so threads with the same problem, and that I've scoured looking for the fix!

SMH . . . Another corporation that our money and support has made too big to be bothered with us.

Thanks, but I've tried that several times as well, to no avail.

I did fix it though . . . it has everything to do with OneDrive settings!  OneDrive should NOT be set to "Save space and download files as I need them."  I don't know the logistics of why, but unticking that box in OneDrive brought back every thumbnail!