As you can see below in the top image, the Command prompt does not recognize "jupyter notebook". However when I "search" for "Anaconda" on my Windows comp, there is an "Anaconda Prompt" (second image) which DOES recognize the jupyter notebook.
There should be a way to run jupyter notebook from the command prompt without having to do a search for "Anaconda prompt". My question is how to do this. Has anyone had a similar experience?