I think other users with this problem can solve it by this method:
see the first post to find out the problem.
solution
1. adding windows entry manually in grub:
do this in this manner:
open file 40_custom in this path /etc/grub.d using this command in teminal
Code: Select all
sudo nemo
menuentry "Windows" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos1)'
chainloader +1
}
2. use a windows booted DVD and do a ready to use boot repair option!