When dragging a window to one side or corner of your screen, Windows 10 will display the thumbnail previews of other open windows to fill the other side of the screen. This looks like that Task View is activated but it’s actually a feature called Snap Assist. If you find the thumbnail previews are really annoying, you can disable Snap Assist using the Settings app in Windows 10.

How to Disable Snap Assist in Windows 10

1. Press the Windows key + I shortcut to open the Settings app. Click on the System category.

   

2. Select the Multitasking tab in the left menu. On the right side, uncheck the option labeled “When I snap a window, show what I can snap next to it“. This will disable Snap Assist thumbnail window only, and you can still snap a window with keyboard or mouse.

   

   If you want to disable snapping completely, just toggle the “Snap windows” option to Off.

That’s all there is to it.