How to solve the error code 0x8024401c: Windows Update encountered an unknown error in Windows Server 2016

There are several steps you can take to solve the error code 0x8024401c in Windows Server 2016:

1. Check your internet connection: Ensure that your server is connected to the internet and that there are no connectivity issues.
2. Restart the Windows Update service: Open the Services app and locate the Windows Update service. Right-click on it and select Restart.
3. Disable third-party antivirus software: Sometimes, third-party antivirus software can interfere with Windows Update. Disable your antivirus software temporarily and try running Windows Update again.
4. Run the Windows Update troubleshooter: Open the Settings app and go to Update & Security > Troubleshoot. Select Windows Update and click on Run the troubleshooter.
5. Clear the Windows Update cache: Open the Command Prompt as an administrator and run 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 and go to Update & Security > Windows Update. Click on Check for updates and wait for the process to complete.