I usually do that anyways. As soon as it's like, "which partition do you want to install to?" I'm like, nope! And delete all the partitions. Just install to the drive.
The windows installer is so retarded with this kind of thing that I make it basically impossible to do wrong. If I have another drive in the system, I unplug it before I install windows, then plug it back in after windows is installed. I want it to see one drive and only one drive and I want it to install to that drive and nothing else. Not a partition, not a specific location, just the drive.