NotWritableError

Hello,

I am a beginner in Anaconda products and environments, but I am taking a Python course titled Python Foundation for Spatial Analysis. I installed the Anaconda Navigator, launched the Anaconda prompt and wrote this: conda create --name python_foundation to which the answer was: NotWritableError: The current user does not have write permissions to a required path.
path: D:\Users\Dell\D:\Personale\Doctorat\CMEMS\CMEMS_prod.conda_envs_dir_test. Apparently I played with it some time ago and changed something, but now I cannot even start my course :(. I already tried uninstalling and installing again, and opening the prompt as admin. Nothing seems to work. I would really appreciate the help. Thank you!