You can download software and run it to clean out all Nero files. Once you complete that, restart your system and process your Nero 7 installation from the website (do not use your disc).
Click start-->control panel-->add & remove programs. Select / highlight the software you want to remove from the computer. Click remove. The computer automatically remove the software.
Hit "Start" then "Control Panel" double click the icon "Programs and Features" find the software you want to remove and double click it That's all there is to it!
You can use some uninstall tool like Final Uninstaller to remove Nero 7. The link below will take you to the tool. It's easy to use and effective.http://www.finaluninstaller.com/I hope this will help.