Trojan gen.2 and zeroaccess infection

One of my computers appears to be infected with both of these viruses.  Norton protection pops up every 5 minutes warning me they have been blocked or quarantined, but it is still annoying.  From the threads I've read, I will await Quads to come to my rescue.  I am running Windows Vista 32 bit on a dell laptop.  TIA.

 

Bill