I have the same problem. There is some extra logical partition weighting 6MB before bootable primary C: partition. I was trying to delete it and merge it into primary partition in order to create secondary logical partition after C:. Unfortunately after deleting firsat logical artition whole system gone crap. There is niothing left on hard drive and none partitions are visible to any partitions managers. I am going to try install ubuntu, and if I fail I will probabily have to remove phisicall hard drive from aao d150. I dn't know whos idiotic idea was to format hd like that, so it is almost impossible to delete preinstalled windows. I have spent almost 48 hours trying to resolve that.