Nope, didn't happen. Automatically downloaded from where? I applied the sound update, and that happened over USB, so it's hooked up (not a bad wire or anything). Windows prompts for drivers, I have chosen auto and it is unable to find anything to install. No disk came with the unit. This is on XP, maybe Vista and WIn7 have a suitable built in Midi driver.
I don't think saving a midi port would be worth the risk of updating the OS for. There is far too much (pro music) stuff tied to this machine to take that risk. I will just run midi cables if there is no plans to support XP, but it would be nice to know for sure.