This guide teaches you how to scan Windows 10 for errors using the System File Checker (SFC) tool. The process first uses the DISM tool to repair corrupted system files from Windows Update, followed by SFC to verify system integrity. This helps resolve issues like crashes, slow performance, or error messages without reinstalling Windows.

Before you start: Ensure you have an updated version of Windows 10.

How to scan for errors in Windows 10

Follow these steps to run the scans safely from an administrator Command Prompt.

  • Press the Windows key or click the Windows logo on the taskbar to open the Start menu.
  • TypeCommand Prompt into the search bar; results appear above the Start menu.
  • Right-click the Command Prompt – App result under the Best match header.
  • ClickRun as administrator and click Yes if prompted for permission; a command-prompt window opens.
  • TypeDISM.exe /Online /Cleanup-Image /RestoreHealth and press Enter; wait a few minutes until you see “The operation has completed successfully.”
  • Typesfc /scannow and press Enter; if it reports corrupt files were repaired, run sfc /scannow again until you see “Windows did not find any integrity violations.” Finally, type exit and press Enter to close the window.
Pro tip: Run these scans weekly or after system crashes and new software installs to proactively maintain Windows health.

Regularly scanning for errors keeps your Windows 10 system stable and responsive. Corrupted files can cause frequent crashes, blue screens, or app failures, but tools like DISM and SFC fix them automatically.

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This process restores missing or damaged system files without data loss or complex troubleshooting. Over time, it improves boot times, reduces error pop-ups, and extends your PC’s reliability, saving you from costly repairs.