How to fix update KB5094126 failed to install in Windows 11 25H2 or 24H2

Update KB5094126 was delivered on June 09.2026. The update offers an array of features including security fixes and performance improvements for Windows 11 24H2 and 25H2. Though update installation issues are common, they can usually be resolved quickly. This article explains the best methods to fix KB5094126 installation errors on Windows 11.

Let us see the different methods step by step to fix update KB5094126 failed to install in Windows 11 24H2 and 25H2.

Method-1: Installing KB5094126 from Microsoft Update Catalog

• Click the link to the official Microsoft repository.

Microsoft Update Catalog

• Here, the Microsoft Update Catalog displays several update packages for KB5094126. You need to choose the package that matches your Windows version (24H2 or 25H2) and system architecture (x64 or ARM64).

If not sure about Windows version or system architecture:

• In your system, click on Start.
• Click Settings.
• Go to System.
• Scroll down and select About.

Here, you will find information about Windows version and architecture.

• Now, in the Microsoft Update Catalog you can find the file supporting your Windows version and architecture. Click Download.
• On the popup, click the link having KB5094126.
• After the download is completed, go to the folder in your system where the file is located.
• Open the file by right-clicking on the file.
• Follow the on-screen instructions and complete the installation.

Method-2: Fix problems using Windows Update

• Click on Search.
• Click Settings.
• Go to System.
• Scroll down and select Recovery.
• Select Reinstall now near Fix Problems using Windows Update.
• Click Ok in the pop-up that appears.

• Navigate to the Windows Update section in Settings; a repair version of Windows 11 25H2 will be downloaded.
• Once the downloading is finished, click the Restart Now button.
• After restarting, open Windows Update on Settings.
• Click Check for Updates.

Method-3: Reset Windows Update components

• Click on Search.
• Type cmd.
• Right-click on the Command Prompt. Select Run as administrator.
• To reset the Windows Update components, type the commands below in the Command Prompt, one line at a time and press Enter each time.

net stop bits
net stop wuauserv
net stop CryptSvc
ren %systemroot%\softwaredistribution softwaredistribution.bak
ren %systemroot%\system32\catroot2 catroot2.bak
net start bits
net start wuauserv
net start CryptSvc

• After running the commands one by one, close the Command Prompt.
• Restart your computer.
• Navigate to Windows Updates on Settings.
• Click on Check for Updates and download.
• Restart the computer after finishing the download.

Method-4: Try modifying Services

1. Click Search.
2. Type Services.

2.1. In the Services menu, scroll down and find Windows Update.

2.2. Right-click on the Windows Update option and select Properties.

2.3. In the Windows Updates Properties pop-up box, set the Startup type to Automatic. Click Apply.

2.4. If the Service status is Stopped, press Start.

2.5. Click Ok.

3. In the Services menu, look for Background Intelligent Transfer Service.

4. Repeat Steps 2.2 to 2.5 forthe Background Intelligent Transfer Service.

5. Now in the Services menu, look for App Readiness Service.

6. Repeat Steps 2.2 to 2.5 forthe App Readiness Service.

Cryptographic Services.

7. Again, look for Cryptographic Services in the Services menu.

8. Repeat Steps 2.2 to 2.5 forthe Cryptographic Services.

9. After completing the above steps, close the Services window.

10. Open Settings and click on Windows Update and try installing the security update.

Method-5: Run System Files checker and DISM tool

• Click on Search.
• Type cmd.
• Right-click on the Command Prompt and select Run as administrator.
• Type SFC /SCANNOW in the Command Prompt and press Enter. Let the process achieve 100% completion.

• Next, type DISM /Online /Cleanup-Image /Restorehealth in the Command Prompt and press Enter. Wait for 100% completion.
• Restart your computer.
• Open Windows Update Settings and try installing the security update.

Method-6: In-place upgrade

If any of the above-mentioned methods are not working, you need to perform an in-place upgrade.

• Open the link https://www.microsoft.com/en-us/software-download/windows11.
• Scroll down to Download Windows 11 Disk Image (ISO) for x64 devices. There is also an option for Windows 11 ISOs for Arm64 devices. Select as per your system architecture (x64 or ARM64).
• You will be prompted to select the product language. To find product language:
• Click on Search .
• Type PC settings.
• Scroll down and select Time and language.
• Click on Language and Region.
• You can see the product language at the Window Display Language option.
• Select the same language as the product language in the prompt window.
• Press Confirm.
• Select Download. Let the download complete.
• Now right-click the ISO file that is downloaded. Select Mount.
• On the Open File Security Warning pop-up, click Open.
• Right click setup.exe.
• Select Open.
• Uncheck the box at the end of the Install Windows 11 window. This can save considerable time in the process of completion.
• Accept the Notice and License Terms.
• Click Install.
• Wait for the installation process to complete. Your system will restart a couple of times.
• Windows 11 will be installed completely, including the security updates.

By following the above-mentioned methods, you must resolve the issue of KB5094126 failing to install in Windows 11 25H2 or 24H2.