Windows 11 is a robust operating system, but over time, system files can become corrupted or missing. These issues may cause slow performance, crashes, or errors when running apps. Fortunately, Windows includes a powerful built-in tool called SFC (System File Checker) that scans and repairs corrupted system files automatically.

This guide walks you through how to run an SFC scan on Windows 11, step by step, making it simple even for beginners.

Table of Contents

What Is SFC (System File Checker)?

The System File Checker is a command-line utility that:

Scans Windows system files for corruption
Replaces missing or damaged files with healthy copies
Helps fix common system errors, blue screens, and app crashes

Running an SFC scan is safe and does not delete personal files.

Why Run an SFC Scan on Windows 11?

You might need an SFC scan if you experience:

System crashes or frequent blue screens
Applications failing to open or crashing
Errors during Windows updates
Strange system behavior, such as missing icons or menus

Regular SFC scans can help maintain your system’s stability.

Step-by-Step Guide: How to Run an SFC Scan in Windows 11

Step 1: Open Command Prompt as Administrator

Press Windows + S to open the search bar.
Type cmd or Command Prompt.
Right-click Command Prompt and select Run as administrator.

⚠️ Running as administrator is essential; otherwise, SFC won’t have permission to repair files.

Step 2: Run the SFC Scan

In the Command Prompt, type the following command and press Enter:

Windows will start scanning system files.

🔹 Note: This may take several minutes depending on your PC’s speed.

Step 3: Wait for the Scan to Complete

The scan will automatically detect corrupted files.
If any issues are found, SFC will attempt to repair them.
You will see one of the following messages when the scan finishes:

Windows Resource Protection did not find any integrity violations – Your system is healthy.
Windows Resource Protection found corrupt files and successfully repaired them – Issues fixed automatically.
Windows Resource Protection found corrupt files but was unable to fix some of them – You may need additional steps (see troubleshooting below).

Step 4: Restart Your Computer

After the scan completes, restart your PC. This ensures that any repaired system files are applied correctly.

Troubleshooting: SFC Scan Issues

1. SFC Cannot Fix Some Files

Run the DISM tool before SFC. Open Command Prompt as administrator and type:

After DISM completes, run sfc /scannow again.

2. SFC Scan Fails to Start

Ensure you are using an administrator account
Check for Windows updates and install them
Disable antivirus temporarily if it blocks system scans

Tips for Using SFC Scan Effectively

Run SFC scan monthly for system maintenance
Combine with DISM for deeper repairs
Always restart after repairing files
Backup important files before running major repairs

Final Thoughts

Running an SFC scan in Windows 11 is a simple yet powerful way to maintain your system’s health. Whether you’re troubleshooting crashes, errors, or slow performance, this built-in tool can save time and prevent further problems.

By following these step-by-step instructions, even beginners can confidently scan and repair Windows 11 system files, ensuring smooth and stable performance.

How to Run SFC Scan on Windows 11: A Step-by-Step Guide for Users