I just installed Anaconda 3 on Windows 10 platform and it finished successfully without any error, however I can't open Anaconda Navigator. I tried to uninstall it via add/remove programs but I got an error:

conda is not a valid conda directory

I deleted anaconda3 folder completely, deleted Python I had on my system before and installed again as admin. I selected add Anaconda3 to my_path environment variable, but didn't select register Anaconda3 as my default python. Instalation completed but I still have the same problem.

I didn't see any anaconda path environment variable so I created them manually (anaconda3, anaconda3\Scripts, anaconda3\Library\bin).I copied these files: libcrypto-1_1-x64.dll, libcrypto-1_1-x64.pdb, libssl-1_1-x64.dll, libssl-1_1-x64.pdb from Library\bin to DLLs, but didn't work.

It's worth mentioning that when I execute conda update --all in anaconda powershell I get this error:

Traceback (most recent call last):
  File "C:\Users\Nastya\miniconda3\Scripts\conda-script.py", line 11, in <module>
    from conda.cli import main
ModuleNotFoundError: No module named 'conda'

What can I do?