I apparently am too old to learn to speak computer..

This is what I have,
Trojan Horse Heur3 BWSF
I found some things online that implied AVG couldn't remove this but scan result says:
" One potentially dangerous threat. All were removed."
If I click on 'one dangerous threat' it says "Result Secured".
Is secured the same as removed? Is it gone? It comes up every time and doesn't tell me if it is a current threat or one already resolved.
Sorry if these are stupid questions, I've been moving all day and I'm tired. However in all honesty I probably couldn't understand what they were talking about anyway.
Thanks
judi