I am trying to install PyQt5 on my Windows 10 python 3.7. I tried several things suggested by different users like:

Install using pip install on cmd.
pip not found error is showing.

Install PyQt5 from downloaded files.
Not happening

Pip3 not working

Even my cmd is not recognizing that my pc has a python program on it.
I suggest trying a few things, and then testing if you can use pip to install pyqt.

Try using pip3 instead of pip or vice versa
Try uninstalling and reinstalling python, making sure that you tick the box to add python to path
Restart your computer

If this doesn't work, then I don't know what else to do.
How to install Pyqt5 on windows python