Turn off Windows 10 Task View sliding animation

Control panel → System → Advanced system settings → Performance settings. Uncheck "Animate windows when minimizing and maximizing".

Only with OFFICE 2016 products, windows weirdly slid around when they were selected and moved - far delayed behind the mouse movement. I had to use WINDOWS-U first, to turn off 'Show Animations in Windows' - this deselected several things in the Performance settings dialog mentioned above. This helped 90%, but the window movement was still slightly delayed behind mouse movement when dragging. The final change that worked was the Show Window Contents While Dragging getting turned off. Performance is now snappy like it ought to be (as it IS for ALL other apps on the machine!). Turned off: Animate controls and elements inside Windows, Animate windows when minimizing and maximizing, Fade or slide menus into view, Fade or slide ToolTips into view, Fade out menu items after clicking, Show window contents while dragging, Slide open combo boxes, and Smooth-scroll list boxes.