Well, I downloaded Ubuntu 13.10 and I want to install it alongside with Windows 7, but when restarted my PC with the DVD in and appears the installation menu, there's no dual boot installation option.
PS: I have installed (alongside with Windows 7) Ubuntu 11.04 (Natty Narwhal) and it also appears as normal program in Windows 7.
I don't understand why it doesn't recognize Windows 7.
I'm a noob.