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Table of Contents
Accessing Command Prompt in Recovery
Using DISM to Repair System Files
Running SFC After DISM
Fixing Boot Issues with Bootrec
Home Computer Tutorials Troubleshooting How to repair Windows 11 using command prompt

How to repair Windows 11 using command prompt

Jul 05, 2025 am 02:59 AM
Command Line

How to use command prompt to repair Windows 11? 1. Enter the command prompt through recovery environment: Enter the recovery environment through USB boot or three consecutive interrupts, and then select Troubleshooting > Advanced Options > Command Prompt; 2. Use DISM to repair system images: Run DISM /Online /Cleanup-Image /CheckHealth to check for corruption, DISM /Online /Cleanup-Image /ScanHealth scan issues, DISM /Online /Cleanup-Image /RestoreHealth to repair problems, and specify external sources if necessary; 3. Run SFC scan: execute the sfc /scannow command to replace the corrupt system files to ensure that it is done after DISM repair; 4. Use Bootrec to repair startup issues: run bootrec in turn /fixmbr repairs the main boot record, bootrec /fixboot writes to the new boot sector, bootrec /rebuildbcd rebuilds the BCD storage. After the operation is completed, restart the system to verify the repair effect.

How to repair Windows 11 using command prompt

If you're having trouble with Windows 11 and need a way to fix it without a full reinstall, the Command Prompt is one of the most powerful tools at your disposal. It works even from recovery environments, which makes it especially useful when Windows won't start normally.

How to repair Windows 11 using command prompt

Accessing Command Prompt in Recovery

Before you can run any repair commands, you need to get into the Command Prompt through the Windows 11 recovery environment. This usually involves either booting from a USB drive or triggering automatic recovery by interrupting the boot process three times in a row (by holding the power button).

How to repair Windows 11 using command prompt

Once you're in the recovery environment:

  • Go to Troubleshoot
  • Click on Advanced options
  • Select Command Prompt

This opens a command-line interface with admin-level access, allowing you to run system diagnostics and repairs.

How to repair Windows 11 using command prompt

Make sure you're logged into an account with administrator privileges.

Using DISM to Repair System Files

The Deployment Imaging Service and Management Tool (DISM) is often the first step when repairing Windows 11. It checks for corruption in the system image itself — something that SFC alone can't do.

Common DISM commands include:

  • DISM /Online /Cleanup-Image /CheckHealth – Checks if there's any corruption
  • DISM /Online /Cleanup-Image /ScanHealth – Scans for issues
  • DISM /Online /Cleanup-Image /RestoreHealth – Repairs problems it finds

You can also use /Source and /LimitAccess switches if you want to point it to a specific Windows image or ISO file.

If DISM fails, try using an installation USB as a source:
DISM /Online /Cleanup-Image /RestoreHealth /Source=C:\mount\windows /LimitAccess

Running SFC After DISM

Once DISM has fixed the system image, it's time to run the System File Checker (SFC). This scans and replaces corrupted system files using the repaired image as a reference.

Run this command:

 sfc /scannow

This typically takes 10–20 minutes. Don't close the window until it finishes.

A few things to note:

  • If SFC reports that it found issues but couldn't fix them, you may need to manually replace files or look into deeper system issues.
  • Always run SFC after DISM — otherwise, it might not have a clean image to work from.

Fixing Boot Issues with Bootrec

Sometimes Windows won't start because of boot configuration data (BCD) issues. In these cases, the bootrec tool comes in handy.

Try these commands one by one:

  • bootrec /fixmbr
  • bootrec /fixboot
  • bootrec /rebuildbcd

These help rebuild the Master Boot Record, write a new boot sector, and reconstruct the BCD store respectively.

If bootrec /rebuildbcd doesn't detect any Windows installations, you might need to check disk partitions or boot into BIOS/UEFI settings to make sure Secure Boot is configured correctly.


That's basically how you use Command Prompt to repair Windows 11. These tools cover most common startup and system file issues without needing third-party software or a fresh install. Just remember to run DISM before SFC, and don't skip checking boot-related commands if Windows won't load at all.

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