Can't hide Ubuntu when booting Windows?

Question

Loaders

Dear pros and not so, the essence of the problem is as follows. It costs Windows 10 and Ubuntu, When you boot, they both appear in the BIOS to choose from. Ubuntu is on top. When in Widows I go to "Advanced system settings" in "Downloads and recovery" in "Loading operating system". There is only Windows, Ubuntu is not there. When I uncheck the box, display a list of systems and only download Windows. Of course it boots Ubuntu.
I need Windows to always boot automatically (without any choice), and when I need to boot, I will press F12, and select Ubuntu and use it))) Save) how to do this) well, it’s real)

Answer 1

When in Widows I go to "Advanced system settings" in "Downloads and recovery" in "Loading operating system". There is only Windows, Ubuntu is not there.

- well, the stump is clear, Windows sees file systems, except for ntfs, fat, fatX, as well as wasps of other families. You need to go into the BIOS and change the boot order of the OS. This is done differently on different Bios. It is also possible to boot from Ubuntu and edit Grub2 settings using grub-customizer. Install grub-customizer:

sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer

How to change the boot order of operating systems ...
In the program, "raise" Windows up, and set the timeout to a couple of seconds.

Answer 2

Windows 7, demolished it completely, formatted everything down to the millimeter) even wiped the dust with a napkin) installed Windows 10, and then ubuntu, there is an automatic function to install next to Windows during installation)) so that they say you are not on the mowing))