I`ve installed Ubuntu on a flash drive, having Windows 10 installed. But now if I turn on my laptop without usb stick i see a GRUB command line (so I guess i have GRUB on my device). I found out how to get grub menu with a usb drive by
And then choose Windows boot loader on a menu. Can I do the same without usb drive? And how do I set it to be automatic, when i turn laptop on without usb drive?