Microsoft has made the updating process incredibly simple, leveraging an in-place upgrade to ensure that data, settings, applications, and drivers are preserved. If you're on a PC right now, there's a good chance that you're running Windows 10. It has already found its way onto more than 110 million PCs, quickly overtaking all-time installations of Windows 8.1. Since its public release on July 29, Windows 10 has quickly become the most adopted computer OS in history. Has Apple done enough to steal market share from Windows? Or can Microsoft's OS extend its dominance beyond the desktop? Windows 10: A smooth, secure transition Windows 10 and OS X El Capitan are making compelling cases for adoption, both in the enterprise and for app developers. I can say with confidence that both are worth the upgrade. Windows 10 and OS X El Capitan offer interesting improvements to several key features of both the UX and UI. A rivalry that has spanned for decades began a new chapter recently as Microsoft and Apple each released updates to their respective operating systems.