Installing Linux Lite on same drive as Windows

[freddy888]

The first thing i did was resize the partitions in Windows using MiniTool Partition Wizard to create 25GB of free space on my SSD. I created my USB install using Rufus which seems to work fine. During the install process when i get to "Installation type" i switch from "Erase disk and install Linux" to the second option "Something else" and select continue. That is where i am stuck. I have options to change all the partitions listed, but no options to do anything with the free space. It is listed as "unusable".