I am on a macbook with 10.5.3 and am running XP on build 5582 in Parallels 3.0. I only access XP to run a program required for graduate school. Everything is running fine as it is currently, and have absolutely no problems. My question is should I update to the newest build 5608? I am afraid if I do that some freak thing will happen and I will lose all my coursework. I appreciate any advice.