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.

We strongly recommend that only experienced PC users download Windows 8.1 Preview or Windows RT 8.1 Preview. Before you download the preview, you should weigh the pros and cons of installing software that's still in development. If you install the preview release, you'll get to try out the many new features, but you might also encounter errors that you wouldn't encounter using a released version of Windows.

Windows 8.1 Preview


Windows 8.1 Preview Product Guide (PDF)