So I tried again because of your comment and found my issue. I wanted to keep windows and try out Linux mint and I didn’t want to buy a USB drive so I used unetbootin to do whatever it does with the iso. I used the same HDD for the iso partition and where I wanted to install to (I have an SSD where windows is and 2 HDD). I guess you cannot do that because it couldn’t unmount the drive? I moved the little fat32 iso partition over to my SSD and now it’s installing.