I have a laptop, and I'm going to install Ubuntu (I have experience, and I have successfully installed Arch Linux, Ubuntu, Fedora, Debian, Xubuntu, Kubuntu, Manjaro Linux, etc.), but installing Ubuntu 14.10 (Utopic Unicorn) alongside Windows 10, Ubuntu can't detect Windows.

It shows me like there's no OS, but I have Windows 10.

I have two primary partitions by the way if I manually install. If the Ubuntu installer can't detect Windows 10, will it be detected at GRUB?