If you see a Search button near your account name at the top of the Start screen, you already have the update. To check if the update is already installed, go to the Start screen. It won’t interrupt what you’re doing except to tell you that you need to restart your PC to finish the installation. If you’re running Windows 8.1 or Windows RT 8.1 and you get updates automatically, you don’t need to do anything Windows Update will download and install the update for you within the next few weeks. Here’s what you need to know about installing this important update. 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. We recommend you move to a Windows 11 PC to continue to receive security updates from Microsoft.

The updated content in the Patches folder.Support for Windows 8.1 ended on January 10, 2023. The slightly larger setup of Windows ADK 8.1 Update. Info about the ADK 8.1 Update and ConfigMgr 2012 SP1 and ConfigMgr 2012 R2: Info about the ADK 8.1 update and MDT 2013: Info on updating WinPE 5.0 to WinPE 5.1: Update : The Windows ADK 8.1 Update Release Notes are here: New features in ADK 8.1 are the WIMBoot option, updates to dism, updates to WinRE and a new WinPE version (5.1). The Octorelease of Windows 8.1 ADK had a folder named 8.100.26020, but the Aprelease of Windows 8.1 ADK have 8.100.26629. The Patches folder content also have a higher version number.

You still run adksetup.exe to install or download the updated ADK, but you do see that the new ADK is slightly bigger than the previous kit. Windows ADK 8.1 update (including doc links): direct download only: Yes, finally, the Windows ADK 8.1 update (for Windows 8.1 Update) is available for download:

Windows 8.1 update download