Apologies if this is a basic question:
I have been trying to setup Python on my laptop by following the tutorial here. Under PIP, VIRTUALENV + VIRTUALENVWRAPPER<
I was having this same problem but got it to work a different way in Windows.
pip install virtualenv
virtualenv venv
.\venv\Scripts\activate.bat
The key here is running activate.bat rather than just activate. Once I did this and closed and opened cmd again and tried the normal
.\venv\Scripts\activate
it worked. I don't know why but it worked for me, hopefully it helps somebody else.