Confused Security COncern

Hi All,

 

I am a LOOOONG time Norton user, but new to the forums.  I am currently running NIS2010.  Upon reading and hearing about ThreatFire, I installed it to run alongside NIS2010.  When I did a QuickScan, my system came back clean.  A few days later I ran the FullScan and 1 item came back as HIDDEN.  It was a Norton folder with a long name, but ended wit"h performance.db-journal".  For the time being I am assuming this is a mistake on ThreatFire's part, but wanted to check here and see what everyone thought.

 

Does anyone know what this is?

 

Thanks.