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This wikiHow article will show you how to run an offline malware scan in Windows Defender for Windows 10. The Windows 10 Anniversary Update introduced the offline scan feature. Rather than attempting a scan while Windows is running as well as an undetected virus running in the background, your computer is restarted and a scan is performed outside of the Windows Desktop to ensure all malware is detected.

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  2. Wait until the checking (and updating if needed) process has finished. This ensures Windows Defender's malware definition files (used to detect malware) are up to date so that you get the most out of your scan.
  3. Doing so will return you to the previous page and allow you to continue the process of beginning the scan.
  4. Click the Scan now button.
  5. Click Scan to begin the scan. Ensure you save any of your work in other apps before continuing.
  6. Select Yes from the popup window.
    • You might need to enter the password to an admin account.
  7. Your PC will restart and the offline scan will begin. When the scan begins, you will see a window with progress bar. Wait until the scan is finished and for your computer to automatically start.
  8. If any malware files are found and removed, you will be informed via a notification the next time you sign in.
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  • Question
    The offline scan is a quick scan. How do you run an offline full scan?
    The coding cat
    Community Answer
    You cannot run a full offline scan using Windows defender. Try Avast Antivirus, which is capable of doing that.
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      Tips

      • You can run Disk Cleanup to delete temporary files, first, if you'd like. This will speed up the process of running the scan.
      • Try to scan your computer at least once a week to check for viruses and malware regularly.


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