Why need to remove Norton LiveUpdate when removing Gaming Harbour

Hi Chaslang and other major geeks, in thread http://forums.majorgeeks.com/showthread.php?p=1361177, which I have found very useful so thank you very much for creating it, you ask for Norton's LiveUpdate program to be removed along with the programs installed by the Gaming Harbour toolbar. Why does this need to be removed?
I am helping one of my neighbours who installed the toolbar and who asked me to look as he was getting ad's popping up everywhere and I found your instructions on major geeks after looking at what was installed on his PC and this toolbar was the only non-std s/w on it.
I did un-install the s/w which seemed to stop the pop-ups but it did leave the directories and files still on the PC. Could this have been due to file extensions being hidden from view at all. I did not notice this before I un-installed the s/w. I can see after re-reading your thread that you say to show them but this is more to do with manually removing. Sorry for posting 2 questions in one thread but as related to gaming harbour put them together.
Appreciate your feedback. I have not yet done all of the steps as wanted to know what each tool did in more detail before running them.
Thanks Cel