I had some entertainment with Avira Antivirus on the the new computer, but I think that's resolved now. (It refused to update virus definitions, which is a bad thing in an antivirus product.)
Many, many things have been copied from the old computer and many bits of software have been installed on the new one.
At this point, I'm thinking about taking the old computer off of the desk and wiring it up in the basement, since I can get to it with both a network connection for moving files and Remote Desktop if I need to run some program that I've missed moving. This is otherwise known as "I'd really like to get the surface of my desk back."
And the new computer feels zippy fast in a great many operations, which is encouraging.