sai6c9.exe/sai16ff.exe identified as 'Trojan.ADH.2'

I received two high risk reports of programs called sai6c9.exe and sai16ff.exe which were blocked as 'Trojan.ADH.2'.

 

Obviously its good news that they were blocked, however I couldn't find anything out about these files when I tried to research them. Does anyone know what they are, and can someone explain what they were trying to do? How did a 'trojan' get on my PC and should I be concerned?

 

Many thanks!