I fixed this error by doing :
  
    
    
    Error access denied 
  
  
    I had finally succeeded by doing : 
edit : 
 C:\Users\Sylvain ARD\.conda\pkgs\cudatoolkit-10.0.130-h5327add_6\Scripts\.cudatoolkit-post-link.bat 

: 
and replace : 
rem post install EULA message; `pre-link.bat` does not show message and shows warning
echo "By downloading and using the CUDA Toolkit conda packages, you accept the terms and conditions of the CUDA End User License Agreement (EULA): https://docs.nvidia.com/cuda/eula/index.html" >> %PREFIX%\.messages.txt

by : 
rem post install EULA m…
  


I progress…