Windows 10: Taskbar previews, fullscreens and Alt Tabbing acting weird since last Windows Update.

Hi,recently, after the last Windows update that my PC asked me to downlaod, I've been having issues with the taskbar and the Alt+Tab function.Usually the taskbar preview that appears when hovering the mouse over a window icon should just show the dropdown preview and thats it, but now it's also unfocusing the window that I'm using, which messes up with the Alt Tab function.Also when using Fullscreen stuff, like a game or even a fullscreen youtube video the window keeps is unfocusing from the fullscreen program, showing me the taskbar and having to click again in the window so it focuses once a

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Weird alt-tab out of fullscreen games.

So recently i have been playing rainbow six siege a lot but my experience has been kind of ruined by this weird alt tab that keeps happening. It usually happens when i flick fast and click. I think my cursor somehow does something even tho its fullscreen
and ive been testing and when i click the bottom right like 2 times quickly it just tabs me out. As you can understand this sucks because sometimes i just get tabbed out mid game.

its like im pressing something in the taskbar even though its fullscreen.

i have 2 monitors btw. But when 1 is turned off it still happens..

 

alt + tab not working

Just found a really cool way to make alt+tab INSTANT!!!

In the launch options write the following: -windowed -noborder





This play exactly the same as fullscreen but now you dont have to wait 30 f*@!ing seconds to alt+tab back in!

Also you don't get the little purple/black checkered effect (only in Source games) from alt+tabbing in fullscreen.

 

alt tabbing increases system performance?

Skyrim doesnt work correctly you alt tab, but if you alt tab to it again while the screen is black, it loads up with the windows cursor over the top. If i repeatedly do this, eventually it fullscreens properly without issues. Slightly weird.