Rootkit help please

Tonight I was checking through my recent history and I noticed two submissions from tonight ...one is a Sample Submission : suspicious.s.rootkit  and the other  a Statistical submission for the same suspicious.s.rootkit

 

 

Does this mean I have a root kit? How will I know for sure?  Norton seems to still be running and in fact it ran a background scan earlier and came up with only a tracking cookie ( as usual).  I will try running a full system scan in the meantime.  Thanks in advance.