New
#1
Hello @Scratchfangs,
Have a look at these . . .
> How to Enable or Disable Thumbnail Previews in File Explorer in Windows 10
> How to Change a Folder Picture in Windows 10
I hope this helps.
https://i.imgur.com/rtVlmZu.png
- - - Updated - - -
https://i.imgur.com/fWl3cO6.png
I had this problem at one time. If my memory serves me correctly, I used Irfanview to open/resave the files and the thumbnails fixed themselves. HTH.
Agreed. Windows Pictures Viewer is quite cumbersome and slow. Try latest Irfanview Irfanview 4.58. I recommend using x86 version even on x64 systems (bettter compability with scanners and plugins).