If you have tried to install Windows 11 update KB5089573 and the installation keeps failing, getting stuck, or not appearing in Windows Update at all, you are dealing with one of several well-documented update delivery and compatibility conflicts that affect a significant number of Windows 11 systems. KB5089573 is a cumulative update that also serves as the enablement package for Windows 11 26H1 features, making it one of the more important updates to get working correctly.
This guide covers every verified fix for KB5089573 not installing and enabling 26H1 features on Windows 11.
What Causes KB5089573 Not Installing on Windows 11
- Windows Update service in a corrupted or stuck state preventing download
- Insufficient disk space on the system drive for the update installation
- Corrupted Windows Update cache blocking the new update from being recognized
- Software Distribution folder containing conflicting update remnants
- Third-party antivirus interfering with the Windows Update installation process
- Windows Update components damaged or misconfigured after a previous failed update
- Group Policy or registry settings blocking feature update installations
- Incompatible drivers or software preventing 26H1 feature enablement
How to Fix KB5089573 Windows 11 Update Not Installing
Fix 1: Run the Windows Update Troubleshooter
The Windows Update Troubleshooter automatically detects and repairs the most common causes of update installation failures, including stuck services and corrupted update cache entries.
Steps:
- Press Win + I and navigate to System, then Troubleshoot
- Click Other Troubleshooters and locate Windows Update
- Click Run next to Windows Update and allow the troubleshooter to complete
- Apply any recommended fixes the troubleshooter identifies
- Restart your PC after the troubleshooter finishes
- Open Windows Update and attempt to install KB5089573 again
Fix 2: Clear the Windows Update Cache
A corrupted Windows Update cache is one of the most reliable causes of KB5089573 failing to install. Clearing it forces Windows Update to download a fresh copy of the update package.
Steps:
- Open Command Prompt as Administrator
- Run the following commands one at a time:
net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver - Navigate to C:\Windows\SoftwareDistribution and delete all contents inside the folder
- Also delete the contents of C:\Windows\System32\catroot2
- Restart the stopped services by running:
net start wuauserv
net start cryptSvc
net start bits
net start msiserver - Restart your PC and attempt to install KB5089573 again
Fix 3: Reset Windows Update Components
If clearing the cache alone does not resolve the issue, resetting all Windows Update components to their default state addresses deeper configuration corruption.
Steps:
- Open Command Prompt as Administrator
- Run these commands one at a time:
net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
regsvr32 /s wuapi.dll
regsvr32 /s wuaueng.dll
regsvr32 /s wucltux.dll
regsvr32 /s wups.dll
regsvr32 /s wups2.dll
net start wuauserv
net start cryptSvc
net start bits
net start msiserver - Restart your PC and retry the KB5089573 installation
Fix 4: Install KB5089573 Manually Using the Microsoft Update Catalog
If Windows Update cannot deliver KB5089573 automatically, downloading and installing it manually through the Microsoft Update Catalog bypasses the delivery system entirely.
Steps:
- Open your web browser and navigate to the Microsoft Update Catalog website
- Search for KB5089573 in the search bar
- Locate the correct version matching your Windows 11 architecture (x64)
- Click Download and save the .msu installer file to your desktop
- Right-click the downloaded file and select Run as Administrator
- Follow the installation prompts and allow the process to complete fully
- Restart your PC when prompted and verify the update is listed as installed
Fix 5: Ensure Sufficient Disk Space on the System Drive
KB5089573 requires adequate free space on your system drive to extract and install its components. Insufficient space causes silent installation failures without a clear error message.
Steps:
- Press Win + E and right-click your C: drive, then select Properties
- Confirm at least 10 GB of free space is available
- If space is low, open Settings, then System, then Storage
- Click Temporary Files and remove unnecessary cached data
- Also run Disk Cleanup as Administrator and select Clean up System Files
- Restart your PC and retry the KB5089573 installation
Fix 6: Run SFC and DISM to Repair System Files
Corrupted Windows system files prevent KB5089573 from installing correctly. Running SFC and DISM repairs the system image before attempting the update again.
Steps:
- Open Command Prompt as Administrator
- Run: sfc /scannow and wait for completion
- Then run: DISM /Online /Cleanup-Image /RestoreHealth
- Allow both tools to finish completely
- Restart your PC and attempt to install KB5089573 through Windows Update
Fix 7: Enable 26H1 Features via Windows Update Settings
If KB5089573 installs but 26H1 features do not appear enabled, the feature enablement package may need to be triggered separately through Windows Update settings.
Steps:
- Press Win + I and navigate to Windows Update
- Click Advanced Options and ensure Receive Updates for Other Microsoft Products is toggled on
- Also enable Get the Latest Updates as Soon as They’re Available
- Click Check for Updates and allow Windows to detect the 26H1 feature enablement package
- Install all available updates and restart your PC when prompted
Conclusion
KB5089573 failing to install on Windows 11 is a Windows Update infrastructure issue that responds to cache clearing, component resets, and manual installation methods. Start with Fix 1 and Fix 2 for the fastest results since the troubleshooter and cache clearing address the most common triggers for this specific update failure. Work through the remaining fixes if KB5089573 continues to fail. With Windows Update components repaired and the update installed correctly, 26H1 features will be enabled and your system will be fully current.
