On Windows 11 (or 10), the Windows Security app provides a central dashboard to manage and configure many security features available with the operating system, such as Microsoft Defender Antivirus, Device Security, and Firewall.
If the app doesn't start correctly, constantly crashes, or shows an error, you can reset it to resolve most issues through the Settings app and PowerShell. However, the instructions will be slightly different depending on whether you have a Windows 10 or 11 computer.
