I also had no problems with "The Notebook" Region 1. I used the latest version of DVDDecrypter to rip to the hard drive. Do NOT let AnyDVD or DVD43 or any other program run while it is ripping. There is no "special protection" on the Region 1 version (other than the same-ole, same-ole CSS and Macrovision that all of the others have).
If this is the Region 2 version, then you have Sony ArCCos copy protection (in addition to the others). Even then, DVDDecrypter's latest version will handle it fine (again, make sure no others are running at the same time).
Here is a thread discussing Sony's ArCCos, and you will note that "Notebook" Region 2 is among those discs discussed:
Make sure you are using the latest DVDecrypter as mentioned in the reply above: DVDDecrypter version 188.8.131.52.
And, from all reports I have read, using AnyDVD along with DVDDecrypter can cause lots of problems if the disc has Sony's ArCCos protection. Yet, DVDDecrypter will handle the protection fine if you just shut that down.