-> I still do assume that the BIOS for your MoBo assigns COM ! and COM 2
-> as available options. Disable them in the BIOS!

I don't presume to know the BIOS of your motherboard. Yet you presume to
know mine, without seeing it.

But I do know this: not all BIOS have a COM2 enable/disable option when
the hardware port does not exist on the motherboard.

--- PCBoard (R) v15.4/M 250 Beta
 * Origin: Torres Vedras - Portugal (2:362/6)