My PC is Infected with Trojan.Gen.2

Hey, can anyone help.  My laptop keeps popping up with alerts from Norton saying that threats have been detected from a Trojan.Gen.2, then it says that issue has been resolved,  then repeats this about every 3-5 mins.  I know that this is a tough one to fix and have not tried any fixes on my own, nor with help from anyone else.  I did read some of the others posts with similar problem and noticed that trying to fix this one on your own was a no, no.  Anyway, I am running a Toshiba Portege with windows 7, 64-bit.  I do have a jump drive and am ready to use it.  Thanks, Brandon