We are aware of this issue. What may help is to make sure that your PYTHONPATH and PYTHONHOME environment variables are pointing to Anaconda's installation directory. So if you installed Anaconda in C:\Users\Marie\Anaconda3, then set both of these variables to that path. On Windows10, click 'start', search for and start 'Advanced System Settings', click the 'Environment Variables' somewhere near the bottom.
A future update will do this for you automatically, but at the moment an issue with Microsoft's packaging system 'vcpkg' prevents us from generating a new installer.