#4
Don't use Norton, Use AVG instead, its free and does same job and doesnt hog your system! you'll notice your pc will be slightly quicker too using AVG.
#5
Its called a keygen. Go to your favourite torrent tracker and search for "(software name) keygen".
#6
And scan it for viruses before you run the keygen.
Which probably means you should do it before the trial runs out.