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Windows 10 updates are essential for keeping your system secure and running smoothly. However, sometimes you may encounter errors during the update process. One common error is 0x80072af9, which can interrupt your update and cause frustration.

This error usually relates to network connectivity or server issues preventing Windows from downloading updates properly. Fortunately, there are several straightforward steps you can take to fix it.

In this guide, we will walk you through simple, detailed solutions to resolve Windows 10 update error 0x80072af9. Each step is explained clearly to ensure even beginners can follow along.

By the end, you should be able to update your system without encountering this error again.

Quick Note Before You Begin

Before diving into troubleshooting, make sure you have a stable internet connection. A weak or interrupted connection often causes update errors.

Also, check that your system date and time are set correctly. Incorrect settings can interfere with Windows Update.

Finally, ensure you have enough free disk space on your system drive (usually C:) to download and install updates.

Step 1: Run the Windows Update Troubleshooter

Windows 10 includes a built-in troubleshooter designed to detect and fix common update problems automatically. Running this tool is the easiest first step.

1. Click on the Start button and select Settings (gear icon).
2. Go to Update & Security and then select Troubleshoot from the left menu.
3. Click on Additional troubleshooters.
4. Find and select Windows Update and click Run the troubleshooter.
5. Follow the on-screen instructions. The troubleshooter will attempt to detect and fix any issues.

This step is important because it can automatically resolve simple problems without requiring manual intervention.

Step 2: Check Your Internet Connection and Firewall Settings

The 0x80072af9 error often happens due to network problems. Make sure your internet connection is active and stable.

You can try opening a web page or running a speed test to confirm connectivity.

Next, check if your firewall or antivirus software is blocking Windows Update servers:

• Temporarily disable your firewall or antivirus software.
• Try running Windows Update again.
• If the update works, add Windows Update to the allowed list in your firewall or antivirus settings before re-enabling protection.

This step helps because sometimes security software mistakenly blocks update services, causing errors.

Step 3: Reset Windows Update Components

If the problem persists, resetting Windows Update components can clear corrupted files or settings that might be causing the error.

Here’s how to do this manually:

1. Open the Command Prompt as an administrator:
   • Type cmd in the Start menu search.
   • Right-click Command Prompt and select Run as administrator.
2. Type the following commands one by one, pressing Enter after each:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:WindowsSoftwareDistribution SoftwareDistribution.old
ren C:WindowsSystem32catroot2 catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Explanation:

• net stop commands stop update-related services.
• ren commands rename folders where update files are stored, forcing Windows to recreate fresh copies.
• net start commands restart the services.

Resetting these components often fixes errors caused by corrupted update files.

Step 4: Check System Date and Time Settings

Windows Update requires your system clock to be accurate to connect securely to update servers.

To check and fix this:

1. Right-click the date and time on the taskbar and select Adjust date/time.
2. Make sure Set time automatically and Set time zone automatically are turned on.
3. If they are already on, toggle them off and on again.
4. Click Sync now under Synchronize your clock.

Correct date and time settings help avoid connection issues with update servers.

Step 5: Use the System File Checker (SFC) Tool

Corrupted system files can also cause update errors. The System File Checker scans and repairs these files.

To run SFC:

1. Open Command Prompt as an administrator (see Step 3).
2. Type this command and press Enter:

sfc /scannow

The scan may take some time. If any issues are found, Windows will attempt to repair them automatically.

After the scan completes, restart your computer and try updating again.

Alternative Method: Use the Windows Update Assistant

If standard methods don’t work, you can manually update Windows 10 using the Windows Update Assistant.

This tool downloads and installs updates outside the usual update process, often bypassing errors.

To use it:

1. Go to the official Microsoft Windows 10 download page.
2. Click on Update now to download the Update Assistant tool.
3. Run the downloaded file and follow the instructions to update your system.

This method is effective when the built-in update feature is not working properly.

Frequently Asked Questions (FAQs)

What causes the Windows Update error 0x80072af9?

This error typically occurs due to network connectivity issues, firewall blocking, corrupted update files, or incorrect system date and time settings.

Is it safe to disable antivirus or firewall during updates?

Temporarily disabling antivirus or firewall is generally safe if done briefly during troubleshooting. Remember to re-enable them immediately after.

Will resetting Windows Update components delete my personal files?

No. Resetting update components only affects update-related files and services, not your personal data.

How long does the SFC scan take?

The System File Checker scan can take anywhere from 10 to 30 minutes depending on your system speed and disk health.

Can I ignore this error and update later?

While you can delay updates, it is not recommended as updates include important security patches and bug fixes.

When Nothing Works

If you have tried all the above steps and still face the error, consider these final options:

• Run the Windows Reset feature to reinstall Windows without losing personal files.
• Contact Microsoft Support for personalized help at support.microsoft.com.
• Check the Microsoft Community forums for similar issues and solutions.

Conclusion

Windows Update error 0x80072af9 can be frustrating but is usually fixable with simple troubleshooting steps. Start with running the built-in troubleshooter and checking your internet connection.

Resetting update components and verifying system date and time often solve more persistent problems. Using the System File Checker and Windows Update Assistant are effective next steps if needed.

Following these steps carefully should help you resolve the error and keep your Windows 10 system up to date and secure.