I am close to ordering a Dell laptop which includes Vista Premium and a 160 GB HD. As a beginning user I know nothing about partitions but I understand that they are worthwhile to establish on a new machine. The particular machine that I am considering can be shipped already partitioned. Here are the choices Custom Hard Drive Partition, 40GB Primary, Remainder Secondary Custom Hard Drive Partition, 60GB Primary, Remainder Secondary Custom Factory Partition, 50 percentage Primary / 50 percentage Secondary Custom Factory Partition, 90 percentage Primary / 10 percentage Secondary Are any of these setups worth selecting? Thanks for your advice.