Partition error with Dualboot

Hello everybody,

I want to install Fedora on my laptop where Windows 7 is already installed sice the beginning. I have used Fedora on VirtualBox for a while but I need to use it more often now so I have decided to isntall it. However, I'm getting a lot of problem when I have to partition.
In fact, my computer has 2 hard drives. On the first one, Windows is installed and on the second there is only datas. There are free space on both hard drives (I mean unpartitionnated).
My problem is that it's impossible to make workable partition. I mean when I try to select the first hard drive to install Fedora, it seems that the hard drive is empty and an automatic partitionning uses all the hard drive (deleting windows at the same time). So I tried to install on the second hard drive, where the created partitions are well detected, but there, I'm getting an error. I create 4 partitions, one for /, one for /boot, one for /home and one for biosboot. I get an error with a gpt label missing on stage1 or I don't know.
Have somebody already had a similar problem ?

Thank you for your help !

PS : Sorry for the mistakes but English is not my mother tong