The biggest and main differences between Operating Systems are simply characteristics. You would change from one OS to another if you didn't like the appearance or things or certain features. Pretty much no other reason is valid to change, as the functionality with actual hardware in your system is identical, it's just presented to you differently.
A computer without an operating system will not operate.
The computer is running on the Windows operating system.
Yes, a computer operating system can be downloaded onto your computer. One of the most common file formats to download operating systems is the .img file format. The .img file format can be used by programs like Oracle's VirtualBox, to create a virtual computer on your own computer. This uses the operating system that is saved in the .img file without overriding your current computers operating system and basically creates another "fake" or virtual computer within your own computer. However, these operating systems can also be used to replace your current operating system or to dual boot your computer, this means to have two operating systems installed on one computer at the same time. Operating systems can also be downloaded for the sole purpose of replacing your current operating system. For example, when a person upgrades their computer from running Windows 8.1 to Windows 10, they are essentially downloading a new operating system on to their computer from Microsoft, but in a way that it completely replaces their current operating system.
operating system decide what your computer will do
An operating system manages the working operation of a computer
operating system is a complete operating system that works on a desktop computer, a notebook computer, or mobile computing device.
Most operating systems native to the computer system allows users to communicate with the computer system
An operating system runs common services for computer programs and manages the computer hardware resources. An operating system is necessary to run application programs.
An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system. Application programs usually require an operating system to function.
Yes - this technique is know as a dual-boot system.
Operating System
The "Operating System" or OS