Resolving Error Code 0x800f0818 in Windows Server 2012 R2

Follow these detailed steps to address error code 0x800f0818 on Windows Server 2012 R2, ensuring successful feature installation:

1. Update your system: Confirm that your Windows Server 2012 R2 is fully updated. Navigate to Settings > Update & Security > Windows Update, and select 'Check for updates'.
2. Deploy the DISM tool: Launch Command Prompt with administrative privileges and execute: DISM /Online /Cleanup-Image /RestoreHealth. This process identifies and rectifies any corrupt files.
3. Run System File Checker: From an admin Command Prompt, enter: sfc /scannow. This scans and fixes any corrupted system files that could be causing the error.
4. Temporarily disable antivirus: Antivirus programs can sometimes block feature installation. Disable your antivirus briefly and attempt the installation once more.
5. Utilize installation media: If previous steps fail, use your Windows Server installation media. Insert the media, execute setup.exe, select 'Upgrade' to upgrade your installation, and follow on-screen instructions.

These measures should effectively overcome the error code 0x800f0818 and facilitate the smooth installation of necessary features.