See the amazing $6000 Dell Precision M6400 that locks up, breaks or otherwise does not allow you to work. I have two of these and they both do the same exact thing .. This movie was taken just after a Dell technical support guy replaced everything in the machine. Does not matter if it is XP XP64 VISTA VISTA64. This one was 40 days old and never even one day allowed continual operation! Dell won't return money and will only exchange with a refurb with no guarantee replacement won't have same problems.