Fixing Error Code 0x800f0818: Unsuccessful Feature Installations on Windows Server 2012

To address the error code 0x800f0818 in Windows Server 2012, follow these steps:

1. Update your server: Ensure your server has the latest updates. Navigate to Settings > Update & Security > Windows Update and select Check for updates.
2. Utilize the DISM tool: Launch Command Prompt with administrative privileges and input: DISM /Online /Cleanup-Image /RestoreHealth. This command repairs corrupted files within your system.
3. Employ the System File Checker tool: Start Command Prompt as an administrator and execute: sfc /scannow. This scans and repairs corrupted system files.
4. Deactivate antivirus software: Antivirus programs can sometimes block feature installations. Temporarily disable your antivirus and attempt the installation again.
5. Employ Windows Server installation media: If previous steps fail, use your Windows Server installation media. Insert the media, run setup.exe, select the upgrade option for your current installation, and follow the on-screen instructions.