Windows 8.1 Preview and Windows RT 8.1 Preview are prerelease versions of Windows 8.1. They build on Windows 8 and bring you more ways to stay productive, have fun, and do all the things you need and want to do on your PC. Windows 8.1 Preview and Windows RT 8.1 Preview include enhancements in personalization, search, apps, the Windows Store, and cloud connectivity, and have the security and reliability features you expect from Windows. They're fast, and made to work on a variety of form factors - especially the new generation of touch devices.

Windows 8.1 Enterprise provides IT professionals with a reliable and easy-to-manage infrastructure for todayâ??s changing and increasingly mobile work styles. It's the fastest and most secure OS from Microsoft for desktop, laptop, or tablet.