Windows & BSOD · high

How to fix0x800f081f

Windows Update Error 0x800f081f (Source Files Missing)

What this error means

Windows Update Error 0x800f081f (Source Files Missing) ranks as a high-severity Windows operating system issue in our database. 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. It's also often linked to lack of internet connection. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Run DISM with a mounted Windows ISO source path

Run DISM with a mounted Windows ISO source path.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Run SFC scan

Run SFC scan.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Check internet connection and Windows Update service status

Check internet connection and Windows Update service status.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

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