I'm trying to install Kubuntu 12.10 on my computer, but when i get to the part where we chose the partition to install Kubuntu, I only have three options and all of them includes using the 100% of my HDD. Since I did't want to have any problems with my other partitions, I canceled the installation. Here's the picture of the screen i mentioned
I'm actually not sure about what it's going to do because I don't have enough knowledge of technical English even though I'm an ELT student. The second bar on the image really bugged me and I thought i better seek for help. Any kind of help would be appreciated by the way. Thank you for your help in advance and have a nice day.