I'v ehad a few wasted days trying to get w'less networking to work.
I tried for hours the other day and gave up. Then when I switched the machine on later - it found the wireless network and it was all so easy.( avoid older cards with AMD177 chipsets unless you really know your stuff- I gave up on them but others can be a hassle).
Norton Internet security caused me big problems with Learn Direct, T-mobile and Loot - blocking pop-ups and java (Ithink - I don't use it anymore)
I'd rather use AVG (lovely, easy new i/face), AdAware and Zone Alarm but, if you're sticking with NIS - get into your options and switch it off till you've got your connection working (watch out 'cos it will reload every time you re-start etc).
(Don't know about anyone else, but I find renaming/replacing old networks never seems to work first time round - or even 2nd attempt..