I need some help. My dvr-103 burns cd and dvds perfectly but will not recognize any type of cd that is not blank such as microsoft office 97 disc. I have never updated firmware or drivers associated with my dvd writer. It was used to install several programs from cd when it was new in Feb 2002 so it used to work fine. I use Nero and also have the trial versions of record now 4.0 and ulead movie factory and spruce up installed. Can these other recording programs cause a problem like this? Also I have used the windows update feature several times since purchasing, last update about 1 month ago. I update and run norton continuously with no viruses found. Any suggestions?