Grub menu with Windows 10 and Ubuntu 14.04

Copy the entries from this:

sudo cp -a /boot/grub/grub.cfg /boot/grub/grub.cfg.backup
gedit /boot/grub/grub.cfg

Copy Windows boot stanza(s) to and edit to have only entries/descriptions you want:

gksudo gedit /etc/grub.d/40_custom

Then do:

sudo update-grub

Once your manual entries work, turn off os-prober by adding this line to /etc/default/grub configuration file to get grub from adding entries automatically. You can turn on with false again if you add another system and want it to find it.

gksudo gedit /etc/default/grub

GRUB_DISABLE_OS_PROBER=true

sudo update-grub

https://help.ubuntu.com/community/MaintenanceFreeCustomGrub2Screen