Changing the default Remote Desktop Protocol (RDP) port on Windows is a critical step in enhancing the security of your system. By default, RDP listens on port 3389, which is widely known and targeted by malicious actors. Automated bots and hackers continuously scan networks for open default ports like this, looking for vulnerable systems to exploit. Altering the default port creates an additional layer of security, making it significantly harder for attackers to locate and target your RDP service.