At its core, the message "FIFA 16 Origin is not installed" is a . When you click "Play" in your library (or launch the .exe directly), FIFA 16 performs a handshake with EA’s client—checking for valid licenses, online features, and DRM verification. If that handshake fails, the game assumes Origin is absent or corrupted.
Some users report that simply creating an empty folder named Origin in C:\Program Files (x86)\ and adding a dummy registry key can trick the game. However, a full legacy install is safer. fifa 16 origin is not installed
This enables manual license reporting. You can get the jar files from this site.