Microsoft Defender cannot be fully uninstalled from Windows as it is a core system component, but it can be permanently disabled or replaced. The most reliable methods involve installing a third-party antivirus (which automatically disables Defender) or using specialized debloating tools like WinAero Tweaker or AtlasOS to strip it from the system image. Step-by-step instructions Method 1: Automatic Displacement via Third-Party Antivirus The officially supported and safest
