Remove Norton serial code

My previous subscription to Norton 360 expired, so I got a new one. The problem is that the previous one has been logged somewhere on my computer, because when I try to re-install it doesn't ask me for a serial code and just ends up expired.
So how do I delete it and use my new one?

>>15
You do not have to. It just keeps file fragmentation at a minimum. Above about 70-80% that can't be guaranteed any more and you might start loosing performance. Maybe even 90%, depending on what kind of files you're dealing with.

I wouldn't let a very busy file server get more than 70-80% full in any case. I've seen the system load (IO as well as CPU) reach high levels much more often at that point, which hadn't been a problem at lower space usage.