Can't install Jupyter Notebook using Windows PowerShell because pip won't upgrade to version 20.1

Question

I'm following this video to install Jupyter Notebook using Windows PowerShell. I entered the scripts folder and type .\pip install jupyter , and then it suggested uploading pip to version 20.1 first. Well, I typed python -m pip install --upgrade pip as suggested, but nothing happened. If I tried to install Jupyter Notebook again, it would just start a circle once again.

Things I have tried but don't work:

1. .\pip3 install jupyter as some other thread online says
2. doing all these in the Python folder (one level up)
3. python -m pip install -U pip , as suggested by the official webpage of installing pip
4. add Path to Windows as instructed by this blog

Why does this happen? Isn't what I get when installing Python 3.8 the lastest version of pip? How can I actually upload it to version 20.1 now?

BTW, this is what my Scripts directory looks like now:

---

Answer 1

After you change the Path variable and before you start python -m pip install -U pip you have to start a new shell.

It's because the Path you setup is not taken dynamicaly.