If you have conda installed in your system then follow these steps:

• conda create -n py36 python=3.6
• activate py36
• conda config --add channels conda-forge
• conda install numpy
• conda install scipy
• conda install dlib
• pip install --no-dependencies face_recognition

Fortunately, I solved the problem. These are the steps to download face_recognition Library:

1- install python:

in the command prompt write python and click Enter, this will open Microsoft store for you, "click download" or "install" to download and install python. "to check if it is downloaded or not type python in the command prompt

2- install pip if you do not have it:

go to: https://pypi.org/project/pip-download/ click download files. Now open the downloaded file, then click right click with the mouse and choose "open in windows terminal". now type the command python get-pip.py. now your pip should be installed, type pip in the terminal to check if it is installed

3-Install Visual Studio tools For C++

go to: https://visualstudio.microsoft.com/ and download the community version of VS. after downloading install it and choose the following options in the installation page:
image1 image2

and choose install

4- installing cmake

Enter the command pip install cmake and wait fo it to be installed.

5- Add cmake to the Path variable

follow the instructions in the following link to know how to add something to your Path variable: https://helpdeskgeek.com/windows-10/add-windows-path-environment-variable/

6- Install dlib

write the following command in the command prompt: pip install dlib

7- install face_recognition

write the following command in the command prompt: pip install face_recognition

8- start your project in PyCharm

click File click Sittings in the search type "interpreter" choose "python interpreter" choose "show all" click the "+" sign choose system Interpreter choose the interpreter that its path starts with the "users" directory

That is the solution I used to fix my problem