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.

Windows continues to be the most widely used operating system in the world, powering over a billion devices from personal laptops and desktops to workstations and enterprise machines. It is the ...

CUPERTINO, Calif.—If you’re buying one of the new iPhones or the other hardware that Apple announced today, your new devices will ship with Apple’s latest operating system updates already installed.