I see the post I attempted to put up with the desktop around noon got partially published before the connection failed. I'm going to delete that post.
And it's obvious I can publish from the laptop. I'm going to boot up the desktop and work on it some more. But first I'm going to send a "HELP!" message to Blogger; I'm not sure what, if anything they'll be able to do since Blogger obviously works from my laptop.
Like I said below, I HATE computers sometimes.