How do i reinstall Norton trail after trail period is out?

-Hi, so a while back i downloaded norton free trail 90days from tpb. Now my trail is over and i cant figure out if there is annyway to reactivate the trail. please help. i have done 90days trail on both NIS and NAVYou'd have to find and remove all of the corresponding registry keys...but that's not a task for the faint of heart: back up your registry before you try. Honestly though, just pay for it, it'll be worth it in the long run.
You cannot reactivate it. That is why it is a trial. You know have to pay if you still want to use Norton.
you cant reinstall them again for free trial usage again until you re-install your OS....its better that you use any free antivirus like AVIRA or AVG...or buy KASPERSKY....
Just buy it!