1.Click START>RUN and type in REGEDIT.

2. Click OK. The Registry Editor will open.

3. Click on the HKEY_LOCAL_MACHINE folder>SOFTWARE folder>AHEAD folder>NERO BURNING-ROM folder>INFO folder

4. The serial number is displayed in the right pane of the registry editor. There you will find an entry named Serial4, Serial5 or Serial6. This entry will be displayed according to your currently or previous Nero install.

14xx-xxxx-xxxx-xxxx-xxxx (for Nero 4 serial number)
or
15xx-xxxx-xxxx-xxxx-xxxx-xxxx (For Nero 5 serial number)
or
1Axx-xxxx-xxxx-xxxx-xxxx-xxxx (For Nero 6 serial number)

Please write this number down.

If you need more help or not sure about how to do this let me know and we might need to go through some kind of chat program to walk you through it