Help with Trojan.ZeroAccess!inf4 and Tojan.Gen.2

Hello there, I was hoping to get assistance with solving these problems. When running scans, Norton keeps telling me I'm infected with Trojan.ZeroAccess!inf4 and occasionally it will bring up Trojan.Gen.2, something about the system.exe file being harmful, and today I also saw something concerning desktop.ini?

 

I'm running Windows 7 64-bit, Intel Core 2 Quad

 

I figured that Quads would be the one helping me out, so to (hopefully) get this rolling faster, I did what usually seems like the first step, and ran SystemLook and attached the file here:

 

Thanks!