To change your Windows RDP (Remote Desktop Protocol) port number to other,
1. Open Registry Editor,
C:\> regedit
2. Navigate to,
HKEY_LOCAL_MACHINE -> System -> CurrentControlSet -> Control ->Terminal Server -> WinStations -> RDP-Tcp
3. Look at “Port number” and select Decimal.
4. Change to any number that you need and perform a reboot if it is not apply immediately.