Learn more. Windows 8.1 Update and Windows RT 8.1 Update (also known as KB 2919355) include improvements that make your favorite apps and settings easier to find and use, provide more familiar mouse and keyboard options, and update security and performance. Here’s what you need to know about installing this important update.

Windows Update can help fix problems with your PC. Fix problems using Windows Update is a recovery tool that can help resolve issues related to updates. Using this tool will reinstall the current version of Windows on your device. This tool preserves all your apps, documents, and settings.

Things to note. To check for updates, select Start > Settings > Windows Update , then select Check for updates. If updates are available, you can choose to install them. Check for updates. If you run into problems updating your device, including problems with previous major updates, see common fixes at Troubleshoot problems updating Windows.

Resolution. Installing Windows Update is a different experience in each user interface in Winodws 8. The classic user interface will allow you to scan and install optional and important updates, while the new user interface will only scan for important updates. For information on how to scan for and install Windows Updates in Windows 8, follow ...