Hi and thanks for your reply. I updated "Line6 Monkey" thinking, "That's what they mean by 'Line6 Updater'" but as I found out they are definitely 2 different utilities. I am very frightened of these sorts of things after so many people I know have had their Vetta amps turned into paperweights (I've been luckier with my own).
It turned out for me that the Updater would not have anything to do with my G10 until I allowed Windows to find drivers for the receiver and transmitter. The receiver is at 1.00 and the transmitter is at 1.04. Those appear to be the latest available.
I still had the same problem so I just spent a bunch of time getting rid of all sorts of Windows spyware/telemetry/updates and, after rebooting, am still getting the same dropouts every 60 seconds.
The only other things I can think of is to uninstall my laptop's wireless driver(s) or move the laptop very far away, none of which is feasible.