Thanks much! It was making me sea-sick.

Didn't know it moved from Office settings to Windows settings! Although now my Start menu animation is lost... I hate these tradeoffs.

I discovered that setting after building a new desktop PC recently. It was disappointing to find the awful keyboard lag introduced by the new OS, as I use MS Office daily.

About start menu animations, I actually prefer the UX without them. I press the Win key and the menu appears, no need to wait.