Quote:
I am trying to update the firmware through an XP virtual machine.
I installed the drivers for this serial to usb adapter I got and it can detect the cable but the Celestron software can't.
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If I recall correctly, Celestron doesn't like COM ports over 20 (something to do with Java I think) so if your adapter is working at COM20+ you will have to change it. A guide to find out/change the COM port can be found
here.
Hope this helps,
-Luke