How to solve the error code 0x800f0906: Windows couldn't connect to the internet to download necessary files in Windows Server 2016

There are several steps you can take to solve the error code 0x800f0906:

1. Check your internet connection: Make sure your internet connection is stable and working properly. You can try restarting your router or modem to see if that helps.
2. Disable firewall: Sometimes, the firewall can block the connection to the internet. Try disabling the firewall temporarily and see if that resolves the issue.
3. Check for updates: Make sure your Windows Server 2016 is up to date with the latest updates. You can check for updates by going to Settings > Update & Security > Windows Update.
4. Use the DISM tool: You can use the Deployment Image Servicing and Management (DISM) tool to repair the Windows image. Open Command Prompt as an administrator and type the following command:

    DISM /Online /Cleanup-Image /RestoreHealth

5. Use the System File Checker tool: You can use the System File Checker (SFC) tool to scan and repair corrupted system files. Open Command Prompt as an administrator and type the following command:

    sfc /scannow

6. Reset Windows Update components: You can reset the Windows Update components to their default settings. Open Command Prompt as an administrator and type the following commands one by one:

   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

7. Contact us or Microsoft support: If none of the above steps work, you can contact us or Microsoft support for further assistance.