Hello, my name is***** to Justanswer! Give me just a few minutes to look up some specifics, I'm working on this now.
Which operating system are you using on your computer? Which version?
That's what I'm seeing is the problem. It is only designed to work with Windows Vista or 7. Did you recently "upgrade" to Windows 10? Drivers haven't caught up with the new version yet, and it's causing quite a large amount of problems with devices not being able to connect.
I'm sorry, you will have to use a Windows 7 computer to connect. It will not work with a Mac computer. You may be able to do the updates with an SD card. If you copy the file to the SD card, insert it in your GPS, and update it that way.
I'm having computer trouble at the moment, please look in your user manual to see how to update with SD.