Trojan adclicker

Hello,

Had some system problems yesterday and discovered my computer was infected by "Trojan adclicker".  I'm running full Norton security suite but apparently this got through somehow.  Virus was detected in a back up volume when I ran a full system scan. I also ran Norton Power Eraser and found no other issues.   Anything else I should do at this point?  Surprised that the Norton suite did not catch this.  Also can anyone advise if there may be any risk of unauthorized access to data from this intrusion?

Thanks kindly!

Steve