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Overview
Windows Defender (Windows 10) or Microsoft Defender Antivirus (Windows 11) is the antivirus solution bundled with Windows. It is automatically configured for scans and protection and receives updates from Microsoft. If you install another antivirus program on your Windows computer, Defender is automatically deactivated. If you remove the other antivirus program, Defender automatically starts protecting your computer again.
See these steps to check your computer's Defender configuration.
Windows 11
Step 1. From the Start menu, click Settings.
Step 2. From the Settings list (left), click Privacy & security.
Step 3. Click the Open Windows Security button.
Step 4. Click Virus & threat protection from the Protection areas. The options window opens. You can run a scan or check other options.
Windows 10
Step 1. Click the Windows Start button and choose the Settings gear.
Step 2. From the Settings window, choose the Updates and Security link.
Step 3. From the Update & Security screen, click the Windows Security option. A list of protection areas opens, and you will see a green check beside each area except family options. Areas include Virus and threat protection, account protection, firewall & network protection, app & browser control, device security, device performance & health and family options.
