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How to fix error code 0x800f081f: Source files not found in Windows Server 2016

There are multiple approaches to resolving the error code 0x800f081f on Windows Server 2016:

  1. Utilize the DISM tool: Launch Command Prompt with administrative privileges and enter the command: DISM /Online /Cleanup-Image /RestoreHealth. This will check and fix any corrupted system files.
  2. Run the Windows Update Troubleshooter: Navigate to Settings > Update & Security > Troubleshoot > Windows Update and execute the troubleshooter.
  3. Manually install the missing files: If the error indicates a specific missing file, download it from the Microsoft website and install it manually.
  4. Review Group Policy settings: Ensure that Group Policy settings are not preventing the update installation. Open Local Group Policy Editor > Computer Configuration > Administrative Templates > System > Specify settings for optional component installation and component repair and set it to Enabled.
  5. Verify the Windows Update service: Confirm that the Windows Update service is operational. Open Services, verify that the Windows Update service is set to Automatic, and ensure it is running.
  6. Execute a system restore: If the previous methods do not resolve the issue, perform a system restore to a prior date when the error was not occurring.

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