Nero 9 has some compatibility issues with windows 7
Here are some methods to fix the Nero running on Windows 7:
1. Run the previous Nero version in Windows XP compatible mode
a. Right-click the exe or setup file -> choose Properties.
b. Under the Compatibility tab-> check the "Run this program in compatibility mode for:" ->and select Windows XP->OK-> run Nero as the Administrator again
2. If the earlier Nero version cannot run in Windows XP compatible mode, you can download the Nero 9 free version or Nero 9 trail version and install on Windows 7.
You can download Nero 9 free version here
http://www.nero.com/ena/downloads-nero9-free.php You can download Nero 9 trail version here
http://www.nero.com/ena/downloads-nero9-trial.php 3. If you don’t want to download the trial or free version of Nero 9, you can only contact the Nero Support to ask for any solution.