Here is how to download and install Atlantis Word Processor under Windows 10:

1. On the Atlantis Word Processor Downloads page, click the Atlantis setup link:
   
   
2. Windows Defender might display the following dialog:
   
   
3. Click the "More info" button:
   
   
4. Click the "Run Anyway" button:
   
   
5. In the dialog from the User Account Control, click the "Yes" button:
   
   
6. Follow the onscreen instructions displayed by the setup of Atlantis Word Processor.