How to fix error code 0x8024401c: An unknown issue with Windows Update in Windows Server 2016

Follow these steps to resolve the error code 0x8024401c in Windows Server 2016:

1. Verify your internet connection: Ensure your server has internet access and no connectivity problems.
2. Restart the Windows Update service: Open the Services application, find the Windows Update service, right-click it, and select Restart.
3. Disable third-party antivirus software: Temporarily disable any third-party antivirus programs that might interfere with Windows Update and attempt the update again.
4. Run the Windows Update troubleshooter: Open the Settings app, navigate to Update & Security > Troubleshoot. Choose Windows Update and click Run the troubleshooter.
5. Clear the Windows Update cache: Open the Command Prompt with administrator privileges and execute the following 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

6. Check for updates manually: Open the Settings app, go to Update & Security > Windows Update, and click Check for updates, then wait for the process to finish.