Thank you and as a way to improve DL's installer, I would suggest to just ask a question on each screen. Either, or questions are a bit intimidating when you are making decisions that may wipe out or corrupt some data or functionality (grub)
As I have noticed many users don't embrace debian at once. For whatever reason, they would rather dual boot a box with an already existing baseline Windows installation If you would like for me to do so, I would make it more explicit for you with screen shots and such. I teach, so I am aware of such things. Actionable information should always be stepwise lbrtchx