Thanks for all the excellent responses to my original post. I have learned a lot about Windows 10 and the upgrade process just by reading everyones responses. I have now downloaded the latest drivers for my TripLite Prolific based USB to RS232 adapter and the Windows 10 drivers for the Orion SSAG. I plan to install the latest drivers on my Windows 7 Pro system and then allow Microsoft to update my observatory computer to Windows 10.
Is there anything I need to do before I upgrade to insure that I can fall back to Windows 7 Pro in the event that I encounter a significant issue with Windows 10?
Fred