Error while running 'jupyter-lab' or 'jupyter lab' on Windows machine

No, you didn’t write the command wrong. Your original image shows you tried what the page linked to says to use. However, I’m not aware of that being the command. So the inconsistency on the Jupyter page verse the JupyterLab documentation is puzzling to me even more so than things not working on Windows. However, sometimes there is more than one way to start things.

UPDATE: Given it says here either jupyter notebook or jupyter-notebook works for the classic notebook, I gather jupyter-lab may be another way. However, I’d prefer the documentation on install and start at Jupyter and JupyterLab documentation sites be consistent so that users having problems, and those trying to help them, aren’t distracted by slight variations of commands that are probably due to flux in the choices made in nascent versions.
Plus in the end it seemed helpful we had found these variants that have the dashes & that aren’t two words with spaces between them.

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