Need help with Trojan.zeroaccess and Trojan.gen.2

I have scanned this virus with malwarebytes and Norton Business Suite.  They both detected it but cannot seem to delete it.  It appears to be in quarantine (according to Norton), but now I can no longer update Norton.  I have tried scanning in safe mode as well, but the programs no longer can detect the virus. It appears to be in desktop.ini. 

 

I am running Windows 7 Home Premium 64 bit, and I have a flash drive.