Windows 11: Update KB5028851 Not Installing/Downloading

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Keeping Windows updated is crucial for maintaining the security and functionality of your operating system. Users sometimes encounter issues when trying to install updates.

One common problem faced by Windows 11 users is the difficulty in installing or downloading Update KB5028185/ KB5028851/ KB5028254. If you’re experiencing this issue, don’t worry – there are several Solutions I know, that you can take to troubleshoot and resolve the problem.

Before explaining KB5028185, KB5028851, and KB5028254 are similar updates so follow the same solutions if these updates are not installing.

Solutions to Update KB5028851 Not Installing/Downloading On Windows 11

1. Check Date and Time Settings

Make sure that your computer’s date and time settings are accurate, as it is essential for a smooth update process. Incorrect date and time settings can lead to synchronization issues with the Windows Update servers.

To check and adjust these settings:

  1. Right-click on the date and time in the taskbar.
  2. Select “Adjust date/time.”
  3. Enable “Set time automatically” and “Set time zone automatically.”
Windows Date Time
Date and Time Settings Windows 11

After making these adjustments, try installing the update again.

2. Check System Requirements

Before attempting to install any Windows update, you should confirm that your system meets the necessary requirements. Ensure that your device has sufficient storage space, and your hardware specifications align with the update’s prerequisites. If your system doesn’t meet the necessary requirements, consider upgrading components or freeing up storage.

3. Run Windows Update Troubleshooter

Windows comes equipped with a built-in troubleshooter designed to identify and resolve common update-related issues. To run the Windows Update Troubleshooter follow:

  • Open Settings.
  • Go to “System” and select “Troubleshoot.”
  • Click on “Other troubleshooters” and run the Windows Update troubleshooter.
Run Windows Update Troubleshooter 1

Follow the on-screen instructions, and let the troubleshooter detect and fix any issues it finds.

4. Temporarily Disable Antivirus/Firewall

Third-party antivirus or firewall software may sometimes interfere with the update process. Temporarily disable these security programs and attempt to install the update again. Remember to re-enable them afterward to maintain your system’s security.

5. Restart Windows Update Service

Restarting the Windows Update service can often resolve update-related glitches. Follow these steps to restart the service:

  • Press Win + R to open the Run dialog.
  • Type “services.msc” and press Enter.
  • Locate “Windows Update” in the list.
  • Right-click on it and choose “Restart.”

Once the service restarts, try installing the update.

6. Clear Windows Update Cache

Corrupted or outdated cache files can hinder the update process. Clear the Windows Update cache by following these steps:

1. Open Command Prompt as an administrator.

Open Command Prompt as an administrator

2. Type the following commands, pressing Enter after each:

net stop wuauserv 
net stop cryptSvc
net stop bits
net stop msiserver

3. Rename the SoftwareDistribution and Catroot2 folders:

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 Catroot2.old

4. Restart the services:

net start wuauserv
net start cryptSvc
net start bits
net start msiserver

After completing these steps, attempt to install the update again.

7. Perform a Clean Boot

A clean boot starts Windows with minimal drivers and startup programs, which can help identify if a third-party application is causing the installation issue. Follow these steps:

  • Open the System Configuration utility by pressing Win + R, typing “msconfig,” and pressing Enter.
  • On the General tab, select “Selective startup” and uncheck “Load startup items.”
  • Navigate to the Services tab, check “Hide all Microsoft services,” and click “Disable all.”
  • Click “Apply” and “OK,” then restart your computer.

After the clean boot, try installing the update. If successful, gradually re-enable services and startup programs until you identify the culprit.

8. Use the Windows Update Assistant

If all else fails, consider using the Windows Update Assistant. This tool, provided by Microsoft, allows you to manually initiate the update process. Download and run the Windows Update Assistant from the official Microsoft website to install the update.


Update KB5028851 is essential for maintaining the security and performance of your Windows 11 system. By following the troubleshooting steps outlined above, you should be able to overcome installation issues and ensure your operating system is up to date. If problems persist, it may be helpful to seek further assistance from Microsoft support or community forums.

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