Big problem with Kali USB boot

Hello, first, i'm sorry about my english, i'm french ..

So, this is my problem : I have a Vostro 3360 of Dell, withn't any cd player, but just only 3 usb 3.0 ( blue )

Already i asked myself if it isn't because of that, that i can't install kali ( my port usb 3.0 ), i saw on internet that the 3.0 may be a problem to boot an OS..
But i can boot kali, I type " install " ( not the graphical install because my touchpad don't work with...), and then when it need to detect the " cd-rom", kali don't detect...
So, like I saw on the web, i unplug and plug the usb, good it's work ! and when the install is on 33%, kali don't detect again... and here, when i unplug plug, this doesn't work...

I hope you will understand my english ahaha, and that you can help me to solve this problem.

Thanks to everyone !

Deymos.

PS : When I boot my usb, first I have a black-screen who says : impossible to mount on dev/sda1 sda2 ... sdb1 etc... and this is a dualboot with windows 7 installed on my SSD