I just bought an HD500 today and I'm trying to update the firmware but apart from not being able to connect to the Line 6 servers in Monkey (same as what guitarno described), I'm also unable to update from file. It comes up with a message saying "Failed to open downloaded file. Reason: (Code 80000001) Out of memory".
I've got no idea if this is a problem with my computer or with the Line 6 software or something else.
Any help would be much appreciated :-) Thanks