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Get answers to questions about updating to Windows 8.1, including system requirements, how to upgrade, and what files, settings, and apps you can keep.
- Install the latest Windows 8.1 Update - Microsoft Windows Help
Learn how to check for, download, and install KB2919355, the latest update for Windows 8.1 and Windows RT 8.1.
- Update from Windows 8.1 Preview to Windows 8.1 - Microsoft Windows Help
Get additional help with updating your PC from Windows 8.1 Preview and Windows RT 8.1 Preview to Windows 8.1 and Windows RT 8.1.
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Get answers to your questions about Windows RT 8.1, such as the difference between Windows 8.1 and Windows RT 8.1, how to get Windows RT 8.1, and what apps and devices work with Windows RT 8.1.