OK. Looking in your Remove Programs, is there any other Nero program shown there? If not, I'm thinking there are left over registry entries.
There are couple of ways you can check this:
1. You can run regedit, click on find, and enter Nero. This is somewhat tedious as it finds one key at a time. You click on Find next for the next key.
2. You can run a registry cleaner program like Ccleaner and let it find the keys. If you do this, I suggest you only delete the keys pertaining to Nero unless you see keys there left over from other programs you have uninstalled.