Question: I am trying to install Jupyter Notebook without installing Anaconda on my Windows. I have followed the steps in https://jupyter.org/install but seems not to work. I have tried to close & reopen the command prompt and restart the Windows but didn't work too. What did I miss? C:\Users\xxxxxx>pip install notebook Requirement already satisfied: notebook in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (6.5.4) Requirement already satisfied: jinja2 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (3.1.2) Requirement already satisfied: tornado>=6.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (6.2) Requirement already satisfied: pyzmq>=17 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (25.0.2) Requirement already satisfied: argon2-cffi in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (21.3.0) Requirement already satisfied: traitlets>=4.2.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (5.9.0) Requirement already satisfied: jupyter-core>=4.6.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (5.3.0) Requirement already satisfied: jupyter-client>=5.3.4 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (8.1.0) Requirement already satisfied: ipython-genutils in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (0.2.0) Requirement already satisfied: nbformat in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (5.8.0) Requirement already satisfied: nbconvert>=5 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (7.3.1) Requirement already satisfied: nest-asyncio>=1.5 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (1.5.6) Requirement already satisfied: ipykernel in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from notebook) (6.22.0) Requirement already satisfied: Send2Trash>=1.8.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (1.8.0) Requirement already satisfied: terminado>=0.8.3 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (0.17.1) Requirement already satisfied: prometheus-client in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (0.16.0) Requirement already satisfied: nbclassic>=0.4.7 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from notebook) (0.5.5) Requirement already satisfied: python-dateutil>=2.8.2 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-client>=5.3.4->notebook) (2.8.2) Requirement already satisfied: platformdirs>=2.5 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from jupyter-core>=4.6.1->notebook) (3.1.1) Requirement already satisfied: pywin32>=300 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from jupyter-core>=4.6.1->notebook) (305) Requirement already satisfied: jupyter-server>=1.8 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbclassic>=0.4.7->notebook) (2.5.0) Requirement already satisfied: notebook-shim>=0.1.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbclassic>=0.4.7->notebook) (0.2.3) Requirement already satisfied: beautifulsoup4 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (4.11.2) Requirement already satisfied: bleach in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (6.0.0) Requirement already satisfied: defusedxml in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (0.7.1) Requirement already satisfied: jupyterlab-pygments in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (0.2.2) Requirement already satisfied: markupsafe>=2.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (2.1.2) Requirement already satisfied: mistune<3,>=2.0.3 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (2.0.5) Requirement already satisfied: nbclient>=0.5.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (0.7.4) Requirement already satisfied: packaging in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (21.3) Requirement already satisfied: pandocfilters>=1.4.1 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (1.5.0) Requirement already satisfied: pygments>=2.4.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from nbconvert>=5->notebook) (2.14.0) Requirement already satisfied: tinycss2 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbconvert>=5->notebook) (1.2.1) Requirement already satisfied: fastjsonschema in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbformat->notebook) (2.16.3) Requirement already satisfied: jsonschema>=2.6 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from nbformat->notebook) (4.17.3) Requirement already satisfied: pywinpty>=1.1.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from terminado>=0.8.3->notebook) (2.0.10) Requirement already satisfied: argon2-cffi-bindings in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from argon2-cffi->notebook) (21.2.0) Requirement already satisfied: comm>=0.1.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipykernel->notebook) (0.1.2) Requirement already satisfied: debugpy>=1.6.5 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipykernel->notebook) (1.6.6) Requirement already satisfied: ipython>=7.23.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipykernel->notebook) (8.11.0) Requirement already satisfied: matplotlib-inline>=0.1 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipykernel->notebook) (0.1.6) Requirement already satisfied: psutil in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipykernel->notebook) (5.9.4) Requirement already satisfied: backcall in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipython>=7.23.1->ipykernel->notebook) (0.2.0) Requirement already satisfied: decorator in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from ipython>=7.23.1->ipykernel->notebook) (5.1.1) Requirement already satisfied: jedi>=0.16 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipython>=7.23.1->ipykernel->notebook) (0.18.2) Requirement already satisfied: pickleshare in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipython>=7.23.1->ipykernel->notebook) (0.7.5) Requirement already satisfied: prompt-toolkit!=3.0.37,<3.1.0,>=3.0.30 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipython>=7.23.1->ipykernel->notebook) (3.0.38) Requirement already satisfied: stack-data in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from ipython>=7.23.1->ipykernel->notebook) (0.6.2) Requirement already satisfied: colorama in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from ipython>=7.23.1->ipykernel->notebook) (0.4.5) Requirement already satisfied: attrs>=17.4.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (22.1.0) Requirement already satisfied: pyrsistent!=0.17.0,!=0.17.1,!=0.17.2,>=0.14.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (0.19.3) Requirement already satisfied: anyio>=3.1.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (3.6.2) Requirement already satisfied: jupyter-events>=0.4.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (0.6.3) Requirement already satisfied: jupyter-server-terminals in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (0.4.4) Requirement already satisfied: websocket-client in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (1.5.1) Requirement already satisfied: six>=1.5 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from python-dateutil>=2.8.2->jupyter-client>=5.3.4->notebook) (1.16.0) Requirement already satisfied: cffi>=1.0.1 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from argon2-cffi-bindings->argon2-cffi->notebook) (1.15.1) Requirement already satisfied: soupsieve>1.2 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from beautifulsoup4->nbconvert>=5->notebook) (2.4) Requirement already satisfied: webencodings in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from bleach->nbconvert>=5->notebook) (0.5.1) Requirement already satisfied: pyparsing!=3.0.5,>=2.0.2 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from packaging->nbconvert>=5->notebook) (3.0.9) Requirement already satisfied: idna>=2.8 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from anyio>=3.1.0->jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (3.4) Requirement already satisfied: sniffio>=1.1 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from anyio>=3.1.0->jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (1.3.0) Requirement already satisfied: pycparser in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from cffi>=1.0.1->argon2-cffi-bindings->argon2-cffi->notebook) (2.21) Requirement already satisfied: parso<0.9.0,>=0.8.0 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from jedi>=0.16->ipython>=7.23.1->ipykernel->notebook) (0.8.3) Requirement already satisfied: python-json-logger>=2.0.4 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-events>=0.4.0->jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (2.0.7) Requirement already satisfied: pyyaml>=5.3 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-events>=0.4.0->jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (6.0) Requirement already satisfied: rfc3339-validator in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-events>=0.4.0->jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (0.1.4) Requirement already satisfied: rfc3986-validator>=0.1.1 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jupyter-events>=0.4.0->jupyter-server>=1.8->nbclassic>=0.4.7->notebook) (0.1.1) Requirement already satisfied: wcwidth in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from prompt-toolkit!=3.0.37,<3.1.0,>=3.0.30->ipython>=7.23.1->ipykernel->notebook) (0.2.6) Requirement already satisfied: executing>=1.2.0 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from stack-data->ipython>=7.23.1->ipykernel->notebook) (1.2.0) Requirement already satisfied: asttokens>=2.1.0 in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from stack-data->ipython>=7.23.1->ipykernel->notebook) (2.2.1) Requirement already satisfied: pure-eval in c:\users\xxxxxx\appdata\roaming\python\python310\site-packages (from stack-data->ipython>=7.23.1->ipykernel->notebook) (0.2.2) Requirement already satisfied: fqdn in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (1.5.1) Requirement already satisfied: isoduration in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (20.11.0) Requirement already satisfied: jsonpointer>1.13 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (2.3) Requirement already satisfied: uri-template in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (1.2.0) Requirement already satisfied: webcolors>=1.11 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from jsonschema>=2.6->nbformat->notebook) (1.13) Requirement already satisfied: arrow>=0.15.0 in c:\users\xxxxxx\appdata\local\programs\python\python310\lib\site-packages (from isoduration->jsonschema>=2.6->nbformat->notebook) (1.2.3) C:\Users\xxxxxx>jupyter notebook 'jupyter' is not recognized as an internal or external command, operable program or batch file. 

Answer: You should add <your_python_root>\Scripts to the PATH environment variables. (Go to Environmental Variables > system variable > Path > Edit). Then the system knows where to find jupyter command.