Here's a couple of threads that offer several suggestions:
NeroVisionExpress 3 Problem
I don't know what's on those pages as I'm at work now and they are blocked by a filter, but have you tried deleting your temp files?
Click Start, Run and then enter "%temp%" without the quotes, then hit OK. Delete all files you see. If some cannot be deleted, then repeat the above process in Safe Mode. Then empty your recycle bin.
Also, right click on Internet Explorer, clear your history, temporary internet files, and cookies.
I don't have NERO, but if it caches any files, delete any temporary files it creates. If you have a program like CCleaner, it might have an option to clean this, but I'm not sure.
Let me know.