Well, as Nero 5.5 and Nero 6 are pure usermode applications, I am still worry that you could bluescreen your system with Nero 5.5 and InCD 4. I am of course glad that for you installing Nero 6 solved the problem, I although will still try to get your problem with Nero 5.5 and InCD 4 reproduced in order to get the problem fixed in InCD 4 (as InCD only has kernel components, it is the candidate guilty application for the bluescreen). So far I was not able to reproduce a bluescreen on the Toshiba Laptops available here, but they are much older than your, much different. Probably getting the same hardware and software configuration as you will help.
Software Development, InCD Project Manager
Nero AG - Im Stoeckmaedle 18
76307 Karlsbad - Germany
fax: +49 (0)7248 928 299 http://www.nero.com