Shaking the mouse while dragging another window’s title bar minimizes all other Windows. The UI to disable this “feature” is no longer obvious and I was able to disable it by making the following registry change. Note: This worked even on a gpo machine since it only modified CURRENT_USER.
registry location
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AdvancedAdd the following DWORD key with value 1
DisallowShaking