I'm sorry to say that by 10 when you returned, I was asleep, in my time zone.
OK, so the Magellan device starts up normally when not connected to a computer, that's a good sign enough.
The device itself doesn't need updating 'for disconnected devices' then. I take it, that was a message on your computer.
Let's try this:
1. restart your computer.
2. if your USB cable for connecting the Magellan device is at all Used or old, replace it with a newer or new one.
3. choose a different USB port on the computer.
4. connect the Magellan device to that USB port on the computer (not on a hub)
5. wait a bit, observing. What noises does the computer make, and what does it show?