Problem: Windows programs cannot be resized or set into smaller windows. Programs always maximized. Minimize button works, but the program cannot be "window-ized"
Windows 10 only.
The operating system is in tablet mode or forced into tablet mode. To unset,
1. Start, Settings, System
2. Select Tablet Mode from the left-nav
3. Turn Tablet Mode off
Windows are now resizable.
If your PC can convert into a tablet, you will have more control (and more things that can be accidentally touched) while in tablet-mode.