Win32/Dridex.AC trojan

When I launch Google Chrome I get the Norton NOD32 Antivirus 8 warning that states:

Threat found in memory

Object: Operating memory>chrome.exe(10040)

Threat: a variant of Win32/Dridex.ACtrojan

Information: cleaned-contained infected files

So while the trojan is contained, it continues to reappear each time I launch chrome and does effect the operating speed and effectiveness of Google Chrome. How can the trojan be located and removed from the computer?