THis is a problem I am having with windows: as I play my cursor sometimes dips down out of play over the taskbar (bottom of screen with the icons on it) and if any windows are open a thumbnail for that window pops up obscuring the bottom of the gameplay window. This also happens in webplay mode unless you can force the window to fullscreen.
Any ideas how to fix this?
example in unity editor - I want to block the little popup window at the bottom of the screen
Thats funny, I have been experiencing the same thing for the last week or so… just assumed it was me! Annoying isnt it!!
Not sure if something has been changed in an uodate recently, used to just be able to move the mouse away and they would disappear again.
This article gives some information relating to increasing the delay before the preview thumbnails will appear;
and here;
I have just rebooted my laptop after about a week or so, and at the moment it seems to be behaving better again, e.g. if I hover over one it appears, but then when I move the mouse away again it disappears.
thanks thats fixed it and prompted me to make a new system restore point which I have neglected!
Great! Glad that’s fixed it for you. 
