If you're having problems receiving Windows Security updates, see Fix Windows Update errors and the Windows Update FAQ.įor info on how to uninstall an app, see Repair or remove an app in Windows.

If you uninstall the other app, Microsoft Defender Antivirus will turn back on automatically. If you have another antivirus app installed and turned on, Microsoft Defender Antivirus will turn off automatically. (In early versions of Windows 10, Windows Security is called Windows Defender Security Center). Windows Security is built-in to Windows and includes an antivirus program called Microsoft Defender Antivirus. For more info, see Windows 10 or 11 in S mode FAQ. But don't worry-the built-in security of this mode automatically prevents viruses and other threats from running on your device, and you'll receive security updates automatically. Because this mode is streamlined for tighter security, the Virus & threat protection area has fewer options.

Some features will be a little different if you're running Windows 10 or 11 in S mode.

Windows 10 quick scan due