Internet Connection Sharing allows LAN computers to access your PC's internet without permission on Windows 11.You can disable Internet Connection Sharing on Windows 11 through Control Panel, Windows Services, or Local Group Policy Editor.To disable via Control Panel, access 'ncpa.cpl,' go to network adapter properties, and uncheck 'Allow other network users to connect.'Using Windows Services, stop Internet Connection Sharing and set it to Disabled under the Startup type to disable it.