Oh right i didnt know it scrambles your ip!

And your anti virus wouldnt effect internet speed, just booting up your pc is where you should notice a speed increase.

Like i said as long as you uninstalled norton properly via add remove programmes, then go into c: and check for any norton folders and delete them

Do something for me, press control alt and delete, at the very bottom of the box how many processes are there? and whats your cpu usage? do that when your not running much, just msn or something