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?

>>11
You seem to confuse the intended file system fragmentation that ext2/ext3 do vs actual file fragmentation which is unwanted. Not writing multiple files strictly sequentially is often beneficial in the long run, true. Because it helps prevent actual fragmentation of single files. Which in turn is bad because that file cannot be read sequentially anymore. Seek times add up and reduce the overall throughput.

The point in not letting your file system get overly full is that at some point, the intended file system fragmentation that ext2/3 do cannot prevent file fragmentation any more. These file systems are quite smart when it comes to preventing file fragmentation but there are physical limits to this. So again it comes down to the user not being a moron.