> We have some equipment in our lab. It needs a computer to control it. 
> Unfortunately, the control software requires somebody to be logged in. As 
> soon as you log out, it quits the control program, halting the machine.

Can't you just lock the machine instead of logging off?

> Except that the control software stubbornly, repeatedly *refuses* to 
> believe me that the USB serial port actually exists. Every other piece of 
> software I've tried can access it without issue. But not the one piece of 
> software that we *need* to access it. No sir. Not interested. It can "see" 
> the port, but it refuses to *select* that port. And nothing I've done so 
> far seems to convince it to work.

OOC what COM port number is assigned to the USB COM port?  If it's higher 
than 4 then you might try changing it to 4 or below (you can usually do it 
from device manager under the properties of the USB-COM adapter).  Some 
older programs don't like working with things like COM7 which those USB 
converters typically come up as.

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