Trojan.Gen Trojan.Gen.2 and Trojan ZeroAccess.B - Having to restart multiple times

Hi,  I ran a full system scan yesterday and identified that the Trojan.Gen, Trojan.Gen.2, and Trojan ZeroAccess.B viruses were on my machine. I followed the instructions to download and run the Power Eraser. This seemed to resolve most of the issues I was experiencing, but the Norton Auto-Protect tool seems to still be finding instances of these viruses. It prompts me everytime to restart my machine, but doesn't seem to be resolving the problem. I'll simply get another alert with the same information within an hour of restarting. What else do I need to do to completely remove this from my machine?

 

Thanks for your help!