Android Studio: Application Installation Failed

Question

I\'ve been trying to learn how to use Android Studio but when I attempted to run one of the sample programs I get this error message:

Installation fai

Answer 1

Step 1: Go to "Setting" → find "Developer options" in System, and click.

Step 2: TURN ON "Verify apps over USB" in Debugging section.

Step 3: Try "Run app" in Android Studio again!

            and you should also TURN ON following fields inside "Developer option" .....

1: TURN ON ->"Install via USB" field