Hello, so I really want to install Kali on my computer. However, I have Windows 8 and Ubuntu installed on it already. I've tried to make a boot-able USB stick, but it won't boot up.

Now, I'm on my Windows 8 OS and I've opened up the Kali installer. It's working as if it was booted up. My concern is, if I select the option "Continue installing Kali" on Windows 8 Boot, will it overwrite my Windows 8 or will it ask me if I want to install it on the side of Windows 8 and Ubuntu? I already made a 3rd partition so I'm not sure why the USB isn't boot-able. I'm just concerned about continuing the installation when I have a lot of pictures and documents on my Windows 8. I made a 3rd partition for a reason.