Can someone please help me set up the environment variables on Windows?

I am trying to set up vim on Windows. UltiSnips always notifies me that the Python provider is missing. Python27 and Python3.8 are installed. I have been trying to enter the python paths variables in "Path" and "PYTHONHOME". It does not work and I am really frustrated by now. On Linux I have never had problems like that. I also don't even code in Python. I just want to get rid of this notification...

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