Get step-by-step instructions for determining the operating system (OS) version on your devices and why it is so important to keep the OS updated.

Not sure which desktop operating system is best for you? We help you choose by comparing the top options based on app compatibility, ease of use, hardware availability, interface design, gaming ...

The computer's master control program. When a computer is turned on, a small "boot program" loads the operating system. Although additional system modules may be loaded as needed, the main part, known ...