I am using Windows 11 on an HP laptop, purchased August 2024. I have installed Python, then added matplotlib (using the command line from PowerShell) and it seemed to be working (In PowerShell I simply typed python -m pip install matplotlib but note that now I have also tried python3.13 -m pip install matplotlib which was suggested by another question, but the console just said that python3.13 (my version) was not a command). I could run a simple program from w3schools.com using matplotlib.