Windows 10 conda is not recognized as an internal or external command

There is a similar question asked here before, check this may be it will help you.

To make sure that conda package is installed correctly, check if conda package files , i.e conda conda-env conda-env-script conda-script conda-server conda-server-script etc are present in Anaconda3\Scripts folder.

When you install anaconda on windows now, it doesn't automatically add Python or Conda to your path.

If you don’t know where your conda and/or python is, you type the following commands into your anaconda prompt

Next, you can add Python and Conda to your path by using the setx command in your command prompt.

Next close that command prompt and open a new one. Congrats you can now use conda and python

Source: https://medium.com/@GalarnykMichael/install-python-on-windows-anaconda-c63c7c3d1444