If you’ve ever stared at your computer and wondered which operating system (and exact version) is actually running under the hood, you’re not alone — and it’s far easier to discover than most people think. This guide walks through simple, reliable ways to identify the exact version of Windows, macOS, and ChromeOS on any machine, explains why the difference between an “edition,” “version,” and “build” matters, and gives practical tips for troubleshooting, security checks, and enterprise...