Threat Detected but not listed

Can someone please tell me why my Avast Pro Antivirus indicates “Threats Detected”, but fails to list the threats for quarantine or other action? It has been doing this for quite some time and I have no idea how to fix it. Is it a problem that I’m going to have to uninstall, then reinstall it to fix the issue?

PC is an ASUS Intel Q8300, 8 gb, Windows 7 Home Premium

https://forum.avast.com/index.php?topic=194892.0

Did you run a smart scan?