Serial number free - Ahead Software Nero 6.0 (60045) for PC

Its illegal for anyone to provide serial keys for programs that have retail values set on them its Pirating
There are lots of freeware alternatives on the internet


http://www.nero.com/eng/downloads-nbl-free.php

you might have a bad batch of cd/dvdrw
this might be because you have not selected the option to burn an audio or data dvd or your burning software does not support dvd burning
There are plenty of free burning software programs on the internet
http://www.freeware-downloads.com/nero_essentials.htm
nero 8.1 essentials free
This is the newest version of the most known CD and DVD burning software, but now with the capability to burn HD DVDs, and Blu-ray Discs
http://www.majorgeeks.com/BurnAware_Free_d5839.html
BurnAware Free is one of the most popular free CD, DVD, Blu-ray Disc burning software available for Windows.
Using this program you can easily create and burn Audio and MP3 CD, Data and DVD-Video disc, ISO and Cue Image,
erase or format rewritable disc, copy your CD or DVD to ISO image.
http://www.majorgeeks.com/CDBurnerXP_d4242.html
CDBurnerXP is a free application to burn CDs and DVDs, including Blu-Ray and HD-DVDs. It also includes the feature to burn and create ISOs, as well as a multilanguage interface. Everyone, even companies, can use it for free. It does not include adware or similar malicious components.