How can I Disable Dial-In Access?
Disable Dial-In Access
It's possible for users to setup a modem on a Windows machine, and by using Dial-up Networking allow callers to connect to the internal network. Especially in a corporate environment this can cause a major security risk.
Option affects the whole PC. Reboot your PC to activate or deactivate this option.
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Limit access to key features of Windows PC ...