Windows Update Error 0x800f081f (Source Files Missing)

What is 0x800f081f?

This error code is triggered when the Deployment Image Servicing and Management (DISM) tool or Windows Update fails to install packages because the required source files to repair the local component store (WinSxS) are corrupted or missing.

Common Causes

• Corrupt local component store
• Incorrect DISM source argument path
• Lack of internet connection

Step-by-Step Fix Guide

• 1
  Run DISM with a mounted Windows ISO source path

  Pointing DISM to a fresh Windows ISO source allows the tool to copy uncorrupted system files directly.

• 2
  Run SFC scan

  SFC should be run subsequently to repair references in the local register.

• 3
  Check internet connection and Windows Update service status

Commands & Diagnostics