Troubleshooting Windows Update Error 0x800f0900

1. Run Windows Update Troubleshooter

Use the built-in troubleshooter to diagnose and resolve Windows Update issues:

1. Go to Settings > Update & Security > Troubleshoot.
2. Click Additional troubleshooters and select Windows Update.
3. Click Run the troubleshooter and follow the instructions.
4. Restart your device after completing the process.

2. Verify Connection to the Internet

Ensure your internet connection is stable:

1. Disconnect and reconnect your network connection.
2. For Wi-Fi users, switch to a wired connection for more stability.

3. Reset Windows Update Components

Reset the Windows Update components to resolve persistent issues:

1. Open Command Prompt with administrative privileges.
2. Type the following commands one by one and press Enter after each:

   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
   

3. Exit Command Prompt and try updating again.

4. Repair System Files Using SFC

The SFC (System File Checker) utility can restore damaged system files:

1. Open Command Prompt as an administrator.
2. Type the command: sfc /scannow and press Enter.
3. Wait for the scan to complete, then restart your device.

5. Use the DISM Tool

Use DISM (Deployment Image Servicing and Management) to fix Windows imaging issues:

1. Open Command Prompt with administrative privileges.
2. Run the following command:

   DISM /Online /Cleanup-Image /RestoreHealth
   

3. Allow the process to complete, then restart your device.

6. Look for Pending Updates

Pending updates may block new installations:

1. Go to Settings > Update & Security.
2. Check for pending updates and install them.
3. Restart your device after updating.

7. Perform a Clean Boot

A clean boot can help resolve software conflicts causing the error:

1. Press Windows + R, type msconfig, and click OK.
2. In the System Configuration window, go to the Services tab.
3. Check Hide all Microsoft services and click Disable all.
4. Go to the Startup tab and click Open Task Manager.
5. Disable all startup items, close Task Manager, and click OK.
6. Restart your device and try updating again.

In Conclusion

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