Problem while writing a slideshow to a DVD using Nero?

I created a slideshow in Nero by combining together many photos and music. When i preview, it was very fine.But if i write it to a DVD,after some time ,my system got halted.When i check the task manager,the CPU usage becomes 100%. Eventhough no other background or foreground processes running ,my system get halted . I don't know why this happens,only if i try to write it to a DVD. All other writing processes are OK,only when writing slideshows i am getting problem.