An operating system is the essential software that's needed to run your computer's suite of software. Everything from video ...

What Is an Operating System? An operating system (OS) is the fundamental software that acts as the brain of your computer. It's the master program that orchestrates all the computer's operations, ...

You can make a computer dual boot or multi-boot by installing multiple operating systems on it in different hard drive partitions. For example, you can make your ...

A beta version of Valve's gaming operating system is now available for download. Here's how you can transform your current computer into a Steam Machine. Dan Graziano is an associate editor for CNET.