I tried installing Ubuntu 12.10 to my Windows desktop for a dual boot system. I used YUMI so I could install it from a flash drive. My problem is that the installer never asked which drive I wanted to install to. After asking about my language, time zone, and keyboard, it just started copying files. I freaked out when I heard it thrashing my hard drive - I thought it was overwriting my copy of Windows, so I forced my computer to shut down while it was working.
After rebooting back into Windows, I see that it deleted everything on my D drive (storage and backup drive) and was apparently installing Ubuntu onto it. I lost a lot of stuff because the installer never asked where I wanted to install Ubuntu (I have multiple hard drives and partitions).
How can I get the installer to check with me before deciding for itself where it's going to install?