UPDATED ON: 2023-11-29 First of all, make sure that firewall is TURNED ON and remote connections are TURNED OFF. As for me, i’m using [Outpost Firewall] . THAN BLOCK THAT UGLY PORT 3389! 3389 This port is used by [RDP protocol] . Take a note that 80% of external intrusions are using RDP interface to hack into your system. Next step will be to disable insecure SMB protocols, by means of command line with elevated admin privileges.