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KB5089548 not installing or stuck in Windows 11

Affects
  • Windows 11, version 26H1
  • OS Build 28000.2113
Daniel Okafor4 min read

Quick answer

If KB5089548 is stuck downloading or fails to install on Windows 11, run the built-in Windows Update troubleshooter under Settings > System > Troubleshoot. If that does not resolve the issue, restart the Windows Update services and clear the SoftwareDistribution cache folder before checking for updates again.

KB5089548 is a cumulative update released on May 12, 2026, for systems running Windows 11, version 26H1, bringing devices to OS Build 28000.2113. When an update like this fails to install, Windows Update may get stuck at a specific download percentage, display an error message, or repeatedly download the update and fail during the reboot phase.

Installation stalls typically occur when background update services become unresponsive, system component files are corrupted, or the local update cache contains damaged files. Because KB5089548 contains updates for Windows 11, version 26H1, getting it installed is important for keeping your operating system up to date. The steps below will help you troubleshoot and resolve the issue.

Method 1: Run the built-in Windows Update troubleshooter

Illustration: the Troubleshoot > Other troubleshooters page under Settings > System

Illustration: the Troubleshoot > Other troubleshooters page under Settings > System

When to use: Use this method first because it is automated, safe, and takes only a few minutes without making major changes to your personal settings.

  1. Click the Start button on your taskbar and select the Settings icon, or press Windows key + I on your keyboard.
  2. In the left sidebar of the Settings window, click on System.
  3. Scroll down the main pane on the right side and click on Troubleshoot.
  4. Click on Other troubleshooters to view the complete list of diagnostic tools.
  5. Locate Windows Update under the Most frequent heading and click the Run button next to it.
  6. The diagnostic window will pop up and automatically search for missing background configurations or stuck update queues. Follow any on-screen prompts if prompted to apply fixes.
  7. When the troubleshooter finishes, close the window, restart your PC, and return to Settings > Windows Update to check if KB5089548 installs.

Method 2: Restart Windows Update background services

Illustration: the Windows Update page in Windows 11 Settings

Illustration: the Windows Update page in Windows 11 Settings

When to use: Use this method if the update process remains frozen at 0% or a low percentage during download, indicating background services are stuck.

  1. Press the Windows key, type Services into the search bar, right-click the top result, and select Run as administrator.
  2. Scroll down the list of services to locate Windows Update.
  3. Right-click on Windows Update and click Stop in the menu that appears.
  4. Scroll up to find Background Intelligent Transfer Service, right-click it, and click Stop.
  5. Scroll down to find Cryptographic Services, right-click it, and click Stop.
  6. Wait approximately 10 seconds to allow all background processes to halt entirely.
  7. Right-click Windows Update again and click Start.
  8. Right-click Background Intelligent Transfer Service and click Start.
  9. Right-click Cryptographic Services and click Start.
  10. Close the Services utility, open Settings > Windows Update, and click Check for updates to test the download again.

Method 3: Reset the Windows Update cache

When to use: Use this method when KB5089548 repeatedly fails to install after downloading, which usually points to corrupted cache files inside the update folder.

  1. Click the Start menu, type cmd, right-click Command Prompt, and select Run as administrator. Click Yes on the User Account Control window.
  2. In the Command Prompt window, type net stop wuauserv and press Enter to temporarily turn off the main update service.
  3. Type net stop bits and press Enter to halt the background file transfer service.
  4. Press Windows key + R to open the Run box.
  5. Type C:\Windows\SoftwareDistribution into the open box and click OK to open the folder in File Explorer.
  6. Select all files and folders inside the SoftwareDistribution folder by pressing Ctrl + A, then right-click and select Delete.
  7. Go back to your administrator Command Prompt window.
  8. Type net start wuauserv and press Enter to restart the update service.
  9. Type net start bits and press Enter to restart the transfer service.
  10. Close the Command Prompt, reboot Windows 11, and attempt to install KB5089548 again from the Windows Update settings screen.

Method 4: Repair system files with SFC and DISM

When to use: Use this method if system file corruption is preventing Windows 11 from writing update files correctly. Warning: System repair commands scan and replace core Windows components. Make sure your device stays connected to power during this process.

  1. Open the Start menu, type cmd, right-click Command Prompt, and select Run as administrator.
  2. In the Command Prompt window, type sfc /scannow and press Enter.
  3. Wait for the verification scan to reach 100%. The screen will show whether corrupt files were found and repaired.
  4. Next, type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
  5. Allow the DISM tool to complete its health restoration process. This may take several minutes.
  6. Once both commands finish, close Command Prompt and restart your PC.
  7. Open Settings > Windows Update and check if KB5089548 installs successfully.

If nothing worked

If KB5089548 still fails to install after trying all the methods above, you can temporarily pause updates in Settings > Windows Update by selecting the option to pause updates for 1 week. This stops your system from repeatedly attempting the installation. You can also use System Restore to revert your device to an earlier state before the update began failing, or perform an in-place upgrade using Windows 11 installation media to repair operating system components without losing your personal files and applications.

Sources

Frequently asked questions

Why is KB5089548 failing to install on Windows 11?

KB5089548 usually fails to install due to corrupted temporary update files in the SoftwareDistribution folder, unresponsive Windows Update services, or corrupted system files.

Is KB5089548 a required update for Windows 11?

Yes, KB5089548 is a cumulative update for Windows 11, version 26H1, providing quality improvements and security patches for OS Build 28000.2113.

What should I do if KB5089548 is stuck downloading at 0% or 99%?

If KB5089548 gets stuck, restart the Windows Update and BITS services using the Services utility or Command Prompt, then clear the download cache in the SoftwareDistribution folder.

Checked against Microsoft's release notes on ; re-checked when a new build ships.

Written by

Daniel Okafor

Writes Thea's error-code and app-breakage guides. Each fix is checked against Microsoft's documentation and community reports, and updated when a new Windows 11 build changes the steps.

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