Grub does not detect Windows 8

[Thrym]

Hey!

I have dual boot installed Kali but the grub loader dous not detect Windows 8.
I allways have to boot over the bios to boot windows.

What should i do?

Thank you

[staticn0de]

Few questions... Is Windows 8 an EFI install? Is Kali an EFI install?

From within Kali, have you run the command 'update-grub' since installing?

[Thrym]

Yeah its both EFI.
When i'm running update-grub it replies 'no volume groups found'.