Hey JohnBob,
I think I found out how to fix my problem! In Device manager I clicked on show hidden devices and then I could see that there was a hidden uno was using COM4. I uninstalled it and then changed the correct uno to COM4. That still didn't work until I disconnected the uno and plugged it back in. Then the upload worked.
Thank you for your effort to help! At least for now I am not dead in the water.