Windows 10: Laptop gone crazy, switching tabs and desktops

Hi guys!

I really need help.


A week ago my laptop Acer Nitro 5 started acting like crazy. Whenever I work or browse the Internet it suddenly minimises and reopens the window I'm currently on and that happens multiple times in a minute, then it shows the start menu and/or whe WiFi menu. I can't even turn it off because it constantly hides my start menu and I have to force shut down it..

It also switches between the multiple desktops I have created and that happens when i press any button when it's in 'crazy mode'


4 days ago i changed my HDD with an SSD and the whole OS was reinstalled, but the problems continued.

Any idea why this happenes and how to stop it? :

:)

 

HELP! My Laptop has gone into SLOW MOTION!

Should be able to get a "step-by-step here;

http://support.dell.com/?~ck=mn

 

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weather tab gone from desktop

 

Windows 10 Alt+Tab can't switch to desktop

In Windows 8, when Alt+Tab, the desktop would appear as an option to switch to at the end of the list of open programs (thus Alt-Shift-Tab helpfully took you right to the desktop).

In Windows 10 that desktop option is gone. Is there any way to get it back?

I know about Windows+D but Alt+Tab is just more convenient in my opinion. And switching to the old old alt-tab also has no desktop and is uglier.