# How to Repair Windows 11 System Files with SFC and DISM

URL: https://www.mytechnician.tech/tips/how-to-run-sfc-dism-repair-windows-11/
Published: 2026-06-30 | Author: Ankit Kumar
Tags: Windows 11, System, Maintenance, Troubleshooting
Summary: Learn how to run sfc /scannow and DISM to repair corrupted Windows 11 system files — the correct order, what each command does, and what to do if they fail.
Recommended app: PC-Troubleshooter — https://www.mytechnician.tech/apps/windows-troubleshooter/ (Microsoft Store: https://apps.microsoft.com/detail/9N7RWKW8SP24?hl=en-us&cid=mytechnician-web). Optional; every step below uses built-in Windows tools.

## The Problem
Apps crash, Windows features misbehave, updates fail, or you're following a troubleshooting guide that says "repair your system files." Windows keeps thousands of protected system files, and when they get corrupted — by a bad update, sudden power loss, disk errors, or malware — almost anything can break.

Windows ships two built-in repair tools for exactly this:

- **SFC (System File Checker)** — scans protected system files and replaces corrupted ones from a local cache.
- **DISM (Deployment Image Servicing and Management)** — repairs the *component store*, the source that SFC restores files from. If the store itself is damaged, SFC can't fix anything until DISM repairs it first.

They work as a pair. This guide shows the right order and how to read the results.

## Quick Checks Before You Start
1. **You need an administrator terminal.** Right-click the Start button and choose **Terminal (Admin)** — accept the User Account Control prompt.
2. **You need an internet connection for DISM** — it downloads clean files from Windows Update when repairing.
3. **Plug in laptops.** A full scan can take 15–45 minutes; don't let the battery die mid-repair.

## Step 1: Run SFC First
1. In the admin terminal, type:
   ```
   sfc /scannow
   ```
2. Press Enter and wait — verification runs to 100% and must not be interrupted.
3. Read the result:
   - **"Windows Resource Protection did not find any integrity violations"** — files are fine; your problem lies elsewhere.
   - **"...found corrupt files and successfully repaired them"** — corruption fixed. Restart and re-test your original problem.
   - **"...found corrupt files but was unable to fix some of them"** — the repair source is damaged. Continue to Step 2, then repeat SFC.

## Step 2: Run DISM to Repair the Component Store
1. In the same admin terminal, run:
   ```
   DISM /Online /Cleanup-Image /RestoreHealth
   ```
2. Wait for it to reach 100%. It often pauses a long time around 62% — that's normal, don't close the window.
3. When it reports **"The restore operation completed successfully"**, the component store is repaired.

Optional quicker checks if you only want a diagnosis: `DISM /Online /Cleanup-Image /CheckHealth` (instant flag check) and `/ScanHealth` (deeper scan, no repair).

## Step 3: Run SFC Again
Now that DISM has fixed the repair source, give SFC a working set of clean files:

```
sfc /scannow
```

This second pass usually resolves the "unable to fix" result from Step 1. Restart your PC afterward.

## Step 4: If Repairs Still Fail
1. **Check the disk first** — file corruption often comes from drive errors:
   ```
   chkdsk C: /f /r
   ```
   Approve the restart prompt with `Y` and reboot. Also verify [SSD and hard drive health](https://www.mytechnician.tech/tips/check-ssd-hard-drive-health-windows-11/).
2. **Review the SFC log** for what couldn't be fixed: the details are in `C:\Windows\Logs\CBS\CBS.log` (search for "cannot repair").
3. **In-place repair install** — reinstalls Windows over itself, keeping files and apps, and replaces every system file: [reinstall Windows without losing data](https://www.mytechnician.tech/tips/reinstall-windows-without-losing-data/).

## When to Use This Guide
Run the SFC → DISM → SFC sequence whenever you hit:
- Apps that [crash or won't open](https://www.mytechnician.tech/tips/fix-app-crashing-wont-open/)
- [Windows Update errors](https://www.mytechnician.tech/tips/fix-windows-11-update-errors/) or a [stuck update](https://www.mytechnician.tech/tips/fix-windows-update-stuck-windows-11/)
- Blue screens like [MEMORY_MANAGEMENT](https://www.mytechnician.tech/tips/fix-memory-management-bsod-windows-11/) or [CRITICAL_PROCESS_DIED](https://www.mytechnician.tech/tips/fix-critical-process-died-windows-11/)
- Broken built-ins: [Start menu](https://www.mytechnician.tech/tips/fix-windows-11-start-menu-not-opening/), [Search](https://www.mytechnician.tech/tips/fix-windows-11-search-not-working/), or the [Settings app](https://www.mytechnician.tech/tips/fix-windows-11-settings-app-not-opening/)

It's the single most useful repair sequence in Windows — safe to run any time, and it never deletes your personal files.

**DISM itself failing with `0x800f081f`?** That means it cannot find the replacement files it needs. Point it at a Windows 11 ISO instead: [fix DISM error 0x800f081f](https://www.mytechnician.tech/tips/fix-dism-error-0x800f081f-windows-11/). **Getting `0x80070005` when you run it?** See [fix error 0x80070005 (access denied)](https://www.mytechnician.tech/tips/fix-error-0x80070005-access-denied-windows-11/).

---
Source: https://www.mytechnician.tech/tips/how-to-run-sfc-dism-repair-windows-11/ — My Technician, free Windows 10/11 troubleshooting guides.
Related tool: PC-Troubleshooter (PC-Troubleshooter is a system diagnostic and repair tool for Windows 10 and Windows 11—hardware, drivers, network, and common fixes in one app.) — https://www.mytechnician.tech/apps/windows-troubleshooter/
More guides: https://www.mytechnician.tech/llms.txt