DISM RestoreHealth Source Error — Windows Image Repair Cannot Find Source Files

Fix DISM /RestoreHealth error when the Windows component store repair cannot find source files, failing to download from Windows Update or use a local source. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: DISM (Deployment Image Servicing and Management) repairs the Windows component store used by SFC. The RestoreHealth option downloads clean files from Windows Update to replace corrupted components. When DISM cannot find source files, it fails with error 0x800f081f or source files not found message. A local Windows ISO or WIM file can be specified as an alternative repair source. DISM must complete successfully before SFC /scannow can effectively repair system files. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Windows Update servers unreachable due to network issues or proxy configuration. WSUS (enterprise) configured as the source but does not have the required repair packages. Local Windows ISO version does not match the installed Windows version and build. Corrupted Windows Update cache preventing download of repair files. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Try online repair first: DISM /Online /Cleanup-Image /RestoreHealth (requires internet). If online fails, use Windows ISO: mount ISO then DISM /Online /Cleanup-Image /RestoreHealth /Source:D:\sources\install.wim. Ensure the ISO matches your exact Windows version and build number. Clear DISM cache before retrying: DISM /Online /Cleanup-Image /StartComponentCleanup. For WSUS environments: temporarily set Group Policy to use Windows Update directly for repairs. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

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