Windows 10: No Task Bar (hovering) preview, no peeking, no full screen is on hovering over and clicking

When there is no window opened, hovering over taskbar app icons, a preview is shown, but on hovering over preview no full window is opened, and no peeking is done, and also clicking on that small preview, no window opened.

1. And whenever there is a window is opened then hovering over taskbar icons doesn't gives any preview of the window.
2. But it still opens window, on just clicking on task bar icons ( i.e. working fine ).

And when two windows of any app is being opened and if minimized any of them then you can not maximise that minimized window...???

• And when both windows of same app is being minimized then hovering over task bar icon of that app still shows those two previews, but clicking on any preview doesn't provide anything, and thus it all means after minimizing those two window of that app you can not recover any of the window.

Basically the problem is I'm not able to open window ( or make full ) from any task bar preview and the First (1.) one also of first paragraph.

:)

 

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.

 

Hovering over a window won't peek when another window is open

So usually when i would hover over a window in my task bar the little thumbnail would pop up and then once i hover over it i would get a "preview" of sorts similar to when you use the aero peek to desktop feature, only that window would be visible and this
is no longer happening and i find it to be an annoyance when trying to multi task

EDIT: This being what i mean as it is hard to put into words when i hover over the spotify thumbnail it doesn't display a preview, i hope this clarifies what i actually meant

 

Aero Peek not working after ATI driver upgraded

After I upgraded to the 10.3 Catalyst driver just a few hours ago Aero Peek is completely nonfunctional - hovering over a thumbnail preview does not bring that window into focus and hovering over the 'Show Desktop' button on the task bar does nothing. I've rebooted several times, changed the advanced display options to 'Best Performance' then back to 'Let Windows Decide' then to 'Best Appearance' with no progress made. Any suggestions? *Confused

EDIT- Fixed - Thank you 95Viper and eidairaman1