requirements.txt - no such file or directory found

I can't seem to install requirements.txt, I get the following error when trying to do so:

c:\Windows\System32\manim>python -m pip install -r requirements.txt
Could not open requirements file: [Errno 2] No such file or directory: 'requirements.txt'

And similarly,

c:\Windows\System32\manim>pip install -r requirements.txt
Could not open requirements file: [Errno 2] No such file or directory: 'requirements.txt'

I am defintely in the correct directory, no question about that, I directly copied the path to manim from file explorer. In the instructions it says to make sure that pycairo==1.18.0 and not pycairo==1.17.1. Well, mine is 1.17.1, but I can't edit the file because it's in the windows folder and I can't edit files in that directory. Really not sure how to proceed, any help would be greatly appreciated.