How to Fix KB5055523 Failed to Install in Windows 11 24H2

If you’re seeing the KB5055523 failed to install error on your Windows 11 24H2 PC, you’re in the right place. This guide walks you through every troubleshooting step—from manual download to an in‑place upgrade—to get that update installed.

What Is Update KB5055523?

KB5055523 is a cumulative update for Windows 11 24H2 that includes security fixes, performance improvements, and reliability patches. When it fails, you may see errors like:

“Feature update to Windows 11, version 24H2 – Error 0x80070643”
“Failed to install KB5055523”

Missing this update can leave your system vulnerable or prevent you from getting the latest features.

Install KB5055523 Manually from Microsoft Update Catalog

1. Open the Microsoft Update Catalog
   • Click the link in your post description or go to catalog.update.microsoft.com.
2. Find the Right Package
   • You’ll see three files:
     • ARM64-based systems
     • x64-based systems
     • Server OS
   • On your PC, press Start → Settings → System → About, then check System type.
3. Download & Install
   • Click Download next to your version, then click the link in the pop‑up.
   • Open File Explorer → Downloads, double‑click the .msu file, and confirm Yes.
   • The update will copy to the Windows Update cache. Restart when prompted.

2. Ensure Essential Services Are Running

If manual install fails, some services might be disabled. Let’s fix that:

1. Press Start, type services, and open the Services app.
2. For each of these services, do the following:
   • Right‑click → Properties
   • Set Startup type to Automatic
   • Click Start if it’s not running
   • Click Apply → OK → Restart

Run the Windows Update Troubleshooter

1. Go to Settings → System → Troubleshoot → Other troubleshooters.
2. Find Windows Update and click Run.
3. If it can’t fix the issue, it will prompt you to talk to an agent. Close it and move to the next step.
4. Reset the Windows Update Cache

Corrupted cache files often block updates. Use the easy batch‑file method:

1. Download the ZIP from your video description.
2. Extract and right‑click the .bat file → Run as administrator.
3. Press any key when prompted.
4. Restart your PC, then try Settings → Windows Update → Check for updates again.

If you prefer manual commands:

net stop wuauserv

net stop cryptSvc

net stop bits

net stop msiserver

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

ren C:\Windows\System32\catroot2 catroot2.old

net start wuauserv

net start cryptSvc

net start bits

net start msiserver

Run each line in an elevated Command Prompt, then reboot.

5. Uninstall Third‑Party Antivirus

Sometimes antivirus hooks block updates:

1. Right‑click Start → Installed apps.
2. Find your antivirus, click the three dots → Uninstall.
3. Follow prompts, reboot, and retry Windows Update.

6. Run SFC and DISM to Repair System Files

1. Open Command Prompt as admin.
2. Run:
3. sfc /scannow
4. DISM /Online /Cleanup-Image /RestoreHealth
5. After each completes, restart and check for updates.

7. Perform an In‑Place Upgrade

If nothing else works, upgrade in place:

1. Go to Windows 11 Download page in your browser.
2. Under Download Windows 11 Disk Image (ISO), select 64-bit, then Download.
3. Once the ISO finishes, File Explorer → Downloads, right‑click the ISO → Mount.
4. Open the mounted drive, right‑click Setup.exe → Open.
5. Check Keep personal files and apps, click Next → Accept → Install.

This refreshes Windows while preserving your data and should install KB5055523.

NOTE

• Always back up critical data before major changes.
• Keep your device plugged in during long updates.
• If errors persist, consult Microsoft Support.

With these steps, KB5055523 failed to install in Windows 11 24H2 should become a thing of the past. Let me know if you need a PDF version, infographic, or social‑media snippets for your blog!

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