感謝兩位指導,換到老婆的電腦就可使用了,我想可能是排線問題,
因最近老是將這台dvd燒錄機搬來搬去使用.排線拔拔插插次數多了接觸不良 所致.　

沒有提供Nero 的版本，目前只有在網路上搜尋到相關資料，參考試試看吧。
http://www.nero.com/nero6/enu/Nero_6_CleanTool.html

First, make sure you have your Nero 6 serial number so you can reinstall Nero/NeroExpress after using CleanTool. The serial number should look like this: 1A2x -xxxx-xxxx-xxxx-xxxx-xxxx. The serial number should be located on the inside of the Nero jewel case, or on the back of the paper sleeve the Nero CD came in. You can also open Regedit (a program in C:\Windows), and go to “HKEY_LOCAL_MACHINE \ SOFTWARE \ Ahead \ Nero-Burning Rom \ Info” to obtain your Nero 6 serial key from there.

Next, download Nero CleanTool to your desktop. Unzip the file with WinZip or WinRar and then double-click on the EXE file to run it. Reboot your system when CleanTool has finished - this will clean the registry and remove all Nero entries. After that, download and install the latest Nero 6 version from our webpage.
Enter your Nero 6 serial number to unlock the trial version.

Try updating to Nero 6.6.0.18 the most stable version of Nero 6 by far.
- write down your Nero program serial number.
- uninstalll your current version of Nero.
- run the Nero 6 Clean Tool: http://www.nero.com/nero6/enu/Nero_6_CleanTool.html
- download and install version 6.6.0.18:
Package 1:
http://www.dvdplusvideo.com/Nero-6.6.0.18_no_yt.exe
Package 2:
http://www.dvdplusvideo.com/NVE-3.1.0.21_no_yt.exe

換個軟體試試看

燒錄機  (pioneer A-08)燒dvd片時,有時僅燒到11%,
就在NERO下出現 (unspecified target error      
PIONEER dvd-rw dvr-108\h5 to )的錯誤,不知何故?
請教各位先進.