Fixing Error Code 0x800f0818: Installation Failure on Windows Server 2012

To address error code 0x800f0818 in Windows Server 2012, you can follow these straightforward steps:

1. Update your server: Confirm your server has the latest updates by navigating to Settings > Update & Security > Windows Update, then click 'Check for updates'.
2. Utilise DISM tool: Launch Command Prompt as administrator and enter: DISM /Online /Cleanup-Image /RestoreHealth to fix corrupted files.
3. Run System File Checker: As administrator in Command Prompt, type: sfc /scannow to repair corrupted system files.
4. Disable antivirus software: Antivirus can block feature installation. Disable it temporarily and attempt the installation again.
5. Use installation media: If previous steps fail, use the Windows Server installation media. Insert it, execute setup.exe, select 'upgrade', and follow instructions.