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.

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 ...

What's really the most popular operating system? That depends on how you look at them and who's doing the looking. For example, Net Applications shows Windows on top of the desktop operating system ...

What are open-source operating systems? Underpinning an operating system, for example Windows on your PC or Android on your phone, is many, many lines of code. Allowing anyone to inspect the source ...

What was Microsoft’s best Windows operating system of all time? If you’re like us, you have…opinions. Even if you’re not the type to parse through all of the little details that separated Windows 98 ...

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 ...