1. Why does the Operating System is the most important software?

2. Does a computer still run without the Operating System? Why?

1.The most crucial program that runs on a computer is the operating system. Because it controls the memory and operations of the computer, as well as all of its software and hardware. Also it allows you to communicate with the computer even if you don't understand its language.

2.Yes, but your computer might stop working since Windows is the operating system, the software that keeps it running and offers a platform for other programs to run on, such as your web browser. Your laptop is nothing more than a collection of bits that don't know how to connect with one another or with you if it doesn't have an operating system.

hope it helps (≧▽≦)