My installation of Anaconda has gone sideways for some reason. I noticed it when I tried to open Jupyter. The start menu shortcut was broken. When I clicked on it, I got the
I'm running Windows 10 Pro Version 1703 OS Build 15063.786. I'm not sure if a Windows update is what caused the issue. Ultimately, all the shortcuts were pointing to things that no longer existed. I performed the following task.
Everything is back to normal. Special thanks to sytech. Checking the environment variables didn't provide a solution but it put me on the right investigative track.