Repairing system files: SFC and DISM
Use DISM and System File Checker in the right order, read their results, and know when to stop.
- Level
- Intermediate
- Length
- About 30 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Explain what SFC and DISM each repair and why the order matters.
- Read the results of sfc /scannow and DISM health checks correctly.
- Decide the next step when repairs fail.
Course outline
- 1.Repairing system files: SFC and DISMVideo · 5 min
- 2.SFC, DISM and the component storeLesson · 8 min
- 3.Reading CBS.log and DISM.logLesson · 8 min
- 4.Offline repair from WinRE and choosing a repair sourceLesson · 8 min
- 5.Repairing system files: SFC and DISM: knowledge checkKnowledge check · 24 questions
- 6.Repairing system files: SFC and DISM: practical exerciseKnowledge check · 1 question
- 7.Settings app crashes; SFC can't fix everythingScenario
- 8.Final exam6 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- Microsoft Support: Use the System File Checker tool to repair missing or corrupted system files
- Microsoft Learn: Repair a Windows image (DISM)
See it with your own jobs and topics
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