a) It came partitioned into two drives, which I don't like.
b) I installed one of the Vista release candidates on one of the partitions, and although I've since removed it, it still shows up as an option when I boot.
Under Disk Management, I have three partitions; a 45GB partition (C:), a 45GB "logical drive" and a 3GB partition called PQSERVICE. "Delete partition" and "Format" are both greyed out when I right click on any of them.
So...how can I reformat? Do I need to create a bootable Windows XP disk (a la this guide and boot from it?