Windows 10: how do I get rid of the blue squares on thumbnails?

I don't know why, but small blue squares with > >have appeared on my thumbnails. They're very annoying - how do I get rid of them?

:)

 

Thin blue square on icons


I removed the arrow from my desktop icons, but i see there is now a thin blue square around most icons. The blue line seems useless and clutters the icon. Does anyone know how to get rid of those blue lines? And why do they appear on some icons and not on others?

 

File Explorer not showing thumbnails

Brink,

Many thanks for you reply. I have done all the steps you suggested, but no change,

When I open a folder containing photos, some open correctly but the vast majority open with thumbnails, but they very quickly get overwritten and you can not longer see the thumbnails.

Are there any more suggestions?

 

Getting rid of taskbar thumbnail previews in windows 10

I want to remove the preview also then I used Taskbar Thumbnails Tuner to achieved it. Although it said it is working on Windows 7 and 8 only, I have tested it is also working on Windows 10. The step is simple:

1. Click "Disable Thumbnails"
   
2. Click "Apply"
   

No need to restart or logout to take effect