Although you could go through each window on your desktop and close or minimize it, that's not efficient.
Ị nwere ike ịgafe na windo ọ bụla na desktọọpụ gị ma ọ bụrụ na ị mechie ma ọ bụ belata ha mana nke ahụ adịghị arụ ọrụ nke ọma, ọ bụ?