Windows 8.1 and Windows RT 8.1 build on Windows 8 and Windows RT to bring you enhancements in personalization, search, apps, the Windows Store, and. If you want to run Windows 8.1 or Windows 8 on your PC, here's what it takes. Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows
Unlock the power of Windows 8, or check out Windows 8.1, and breathe new life into your PC. Upgrade today via disk or download at the Microsoft Store.