Windows 10: Taskbar thumbnail hover preview not showing

So today when i hovered over a window with two tabs it is no longer showing me the thumbnail preview. What is going on please help me.

:)

 

no full screen preview when hovering taskbar thumbnail

Last time when I fresh install Windows 10 and whenever i hover my mouse cursor to multiple opened browser it show thumbnails, and when I next hover the cursor to that particular thumbnails it will show full screen preview as you might say peek. Now it doesn't
do anything anymore.

Can anyone help?

The picture attached is the preview thumbnail and when i try hover to the default Firefox browser it does not 'peek' into it anymore.

 

taskbar "live" thumbnail preview not playing

I recently restored my desktop. After the restore, my taskbar thumbnail preview stopped showing a """live"""" picture(video) of what an application was doing, instead, it shows a still photo. I did notice that if the application wasn't minimized and I hovered
over the thumbnail of that application, the thumbnail preview was showing the "live" picture and not a still photo. For example, if a video was playing on a browser then when the browser was not minimized and my mouse was on the thumbnail preview. In the preview,
the video would also be playing but if the application was minimized then the preview would be a still photo

THERE ARE MANY QUESTIONS OUT THERE HASN'T BEEN PROPERLY ANSWERED AND SOLVED

 

How to OPEN Programs in Taskbar Preview WITHOUT Clicking ??

@Triliuner I'm sorry to hear it's not as simple as that.

When you have multiple windows opened from a single application e.g. 2 separate windows from Chrome, do they show up as previews when you hover over Chrome's icon in the taskbar, or as a list? Just asking to clarify that, they are at least showing as previews. If not, this should help: Change Taskbar Thumbnail Threshold to Show List in Windows 10 Windows 10 Tutorials

As for the different windows not showing when you hover your mouse over a preview, maybe it has something to do with the delay, see here: Change Delay Time to Show Taskbar Thumbnails in Windows 10 Windows 10 Tutorials (restoring the default value)

I hope that helps, if not, maybe others can suggest some other things to try..