Ouais ou si tu connias l´anglais...
Logitech serial pointing devices in Windows XP:
Pointing devices connected to the serial port are no longer supported by Logitech MouseWare in Windows XP. If your device is a combination PS/2 and Serial mouse, we recommend using the PS/2 connection. Please view the connection matrix to determine if your serial pointing device can connect to the PS/2 mouse port. If your device is serial only, you must use the operating system´s native drivers.