SymUIAgent pop-up

I've seen questions about this on other forums but I don't think they apply to me. Some time ago, I switched from Norton to McAfee.  I thought I'd uninstalled all the Norton software but I would continue to get Norton messages saying that it was scanning files for viruses, etc. I wasn't too bothered by it because it didn't happen very often so I didn't run it down.

 

Now I just installed the Lion OS on my MacBook and I've started getting a pop-up message about some computer identified as "fd00:6587:52d7:1532::1" trying to access my system.  When I hit the "block" option, it asks for my password so that "SymUIAgent can make changes to my system".  The message is from Norton Firewall which I thought I'd uninstalled. (I've searched for every application on my computer with either Norton or Symantec in the file name and deleted it.)

 

I don't want SymUIAgent making any changes to my system and I want all Norton products off of it.  What can I do?

 

Thanks for any help you can give me.

To remove all Symantec programs and files you can download and run the RemoveSymantecMacFiles from this zip.

 

Please refer this support document for a complete step by step operations.