Boot.tidserv

Hello - I downloaded Norton 2012 this week, running it on  Windows XP on a PC.

 

Works great so far, but I keep getting a Threats Detected screen for something called Boot.tidserv.

 

Keeps saying Remove Failed, and wants me to rescan, but then I just get the same message again.

 

Any pointers on what I can do here? I am not what you would call a computer expert, but I am pretty good at following instructions.