Hi Dawg,
Sorry to hear that you are having problems removing this threat. I went over the writeup for this Trojan and it looks like it is a nasty one. Some variants can be spread via network shares. If you have a variant that can be spread that way, then It is possible that you are being reinforced after each scan. Also,since it is a Trojan horse with backdoor access, there is no way to tell what has happened on your system if the system has actually been hacked.
Because of this, it is important that you follow these steps. ( I am assuming that you have the 2008 version of the product. If not, let me know your version since the steps will be a bit different for a different version.)
1. Download the latest virus definitions via the Symantec Web site (these definitions are the most current)
Title: 'How to update virus definition files for Norton 2008 product using Intelligent Updater'
Document ID: 2007090100014179
> Web URL: http://service1.symantec.com/SUPPORT/norton2008.nsf/docid/2007090100014179
2 Start your Norton program.
3 On the Norton product tab, click Settings,
4 Under Basic Security, click AutoProtect and then click Configure.
5 Check Load Auto-Protect during system startup.
6 Click Apply.
7 In the left pane, click Exclusions.
8 In the left pane, click Low Risk Exclusions.
9 Under "How to respond when a low security risk is found", click Automatically remove low-risk items.
10. Click Apply and then click OK.
11. Unplug your network cable or your wireless modem. You should not be connected to the Web during this process to avoid re-infection via network shares.
12. Restart in Safe mode and run a Full System Scan (not a Quick Scan!!)
12. Restart in Normal. AP will scan on startup.
13. Open your Norton program and run one more Full System Scan. If the program detects an infected file, this is usually an indicator that this may be a new variant. Locate and quarantine the file and submit the file to Symantec via https://submit.symantec.com/websubmit/retail.cgi
14. If nothing is detected, plug your network cable back in or start your wireless modem.
This is the full meal deal of scans. If nothing is detected at this point, then you can be confident that all is well. If something continues to be detected then it is very important that the detected files be submitted for review.
Thanks,
RichC