but I'll post as new thread just in case.
Story:
I got an MX213 USB today (God bless KustomPCs!) and it all lit up fine and dandy.
obligatory "but..."
When I install the drivers, it runs through the install of the MX2xx driver OK, but fails at the end of the install for the USB serial port driver (2nd part of Henry's guide)
I'm getting an error message "The name is already in use as either a service name or a service display name"

When I checked Device Manager (as Miles suggested in the other thread), the "MX2xx USB" driver shows up fine, but the "USB Serial Port" has the dreaded yellow exclamation mark. Oooh!

I tried the CD drivers first, then the V10 drivers, then the (wonderfully named) P8002104 drivers. Uninstalling the drivers and rebooting each time.
The only clue I have at the moment is that, sometimes (ugh!), the hardware installer looks for ftserui2.dll (note the 2) - which is only on the CD-based drivers.
Any ideas? hints? suggestions? large bits of wood to hit myself with?
I'm gonna rebuild my machine this weekend. Maybe a fresh install of windoze will help Ooo!