Action Required - Threats Detected -What am I supposed to do?

A dialog appears, Action Required - Threats Detected;

Title shows :  PUA.Astromenda

Recommended Action shown is "Exclude" and a GO button next to it.

At the bottom there is a Close button and an Apply All button;

Over at the left is the statement "removed files are quarunteened".

WHAT AM I SUPPOSED TO DO ABOUT THIS MESSAGE ABOUT THE THREAT?

 

NORTON 360 on Windows 7, tower-style desktop, Hewlett Packard machine