When Windows 11 is responding slow and sluggish, or you suspect that a type of malware has infected the computer, the antivirus includes three different scans (quick, custom, and full) that you can use with the Windows Security app, Command Prompt, and PowerShell. This guide will teach you the steps to perform a complete virus scan using the built-in anti-malware solution on Windows 11.

Run a full virus scan on Windows 11 Run a full virus scan with Command Prompt Run a full virus scan with PowerShell

Run a full virus scan on Windows 11 

To perform a full virus scan on Windows 11, use these steps: Once you complete the steps, Microsoft Defender Antivirus will scan the computer for viruses and other types of malware. If anything is detected, the antivirus will remove (or quarantine) the threats automatically.

Run a full virus scan with Command Prompt

To run a Microsoft Defender Antivirus scan with commands, use these steps: After you complete the steps, Microsoft Defender will scan, detect, and remove any malware on the computer. You will notice the “Start scanning” messages as you execute the command. Once the scan is complete, the “Scan finished” message will return on the screen.

Run a full virus scan with PowerShell

To start a full virus scan with PowerShell, use these steps: Once you complete the steps, the antivirus will perform a full scan on Windows 11 to remove any malware.

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