Ex 46 on Windows 10: Virtualvenv is not recognized


I have been trying to do exercise 46 on Windows 10 using PowerShell. I have installed the Virtualenv already but for some reason I can’t run the code:

virtualenv ––system–site–packages .venvs/lpthw

It keeps giving me:

'virtualenv' is not recognized as an internal or external command,
operable program or batch file.

I have tried possible solutions like uninstalling and installing Virtualenvs, and running a command Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process which didn’t do anything.

Can someone help me with this? Thank you so much!