1. Download Oracle Software (WINDOWS.X64_193000_db_home.zip), you will need to login using free OTN account to download, ~3GB
https://www.oracle.com/uk/database/technologies/oracle19c-windows-downloads.html
https://download.oracle.com/otn/nt/oracle19c/193000/WINDOWS.X64_193000_db_home.zip
2. Unzip WINDOWS.X64_193000_db_home.zip
Right click WINDOWS.X64_193000_db_home.zip and Extract All…
use default name for folder to extract: WINDOWS.X64_193000_db_home
Allow 10 minutes for Extract to complete and be ~6GB in size
3. Run/double click setup.exe in WINDOWS.X64_193000_db_home
When asked if to allow app to make changes to PC confirm ok
Software Install will take about 5 Minutes