Here is my problem i recently installed Kali linux And when i go to the grub i didn't saw my Win 7 although i have one im pretty sure i didn't used the whole disk
i tried adding this to the 40_custom
PHP Code:
menuentry "Windows 7 (loader) (on /dev/sda4)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos4)'
chainloader +1
boot
} 
but its just empty i just getting returned back to the grub selection...