I have burnt DVDs before on my computer and decided to burn one after i reformatted my computer.....and it stopped working...it would say it is burnt perfectly on nero but the DVDs would come out blank and my desktop crashes when it tries to read it...
Have you tried burning with DVD Decrypter, ImgBurn or any other program other than Nero? Does your drive recognize and playback commercially pressed DVDs?
As Attar suggested, post only the last section of your Nero History log that begins: ===== Nero Burning Rom Nero History ===== program serial number Remove your serial number and name before posting. The log is in this path: Program Files -> Ahead -> Nero -> NeroHistory