python – conda command fails after anaconda installation

After installing Anaconda in Windows I get the following error when trying to use it:

:

Traceback (most recent call last):
  File "C:\Users\mohamed\Anaconda3\Scripts\conda-script.py", line 11, in <module>
    from conda.cli import main
ModuleNotFoundError: No module named 'conda'

:

Traceback (most recent call last):
  File "C:\Users\mohamed\anaconda3\Scripts\anaconda-script.py", line 6, in <module>
    from binstar_client.scripts.cli import main
ModuleNotFoundError: No module named 'binstar_client'

I tried to delete and reinstall anaconda several times but useless