Windows 10: How to be offered Ubuntu at time of boot (GNU GRUB?)

So hey -- I've done all the hard work but the last step has perplexed me. I've installed Ubuntu Budgie on a separate partition of my disk so that I can dual boot Win10 or Budgie.

(I'm doing this because I have a mini PC from Beelink and I'm attempting to see if Budgie is a 'lighter' OS than Win10 and, therefore, would help the Apollo Lake unit run even faster.)

My problem is that when I boot up the PC is supposed to ask me which OS I want. It doesn't. I've seen in tutorials that something called the GNU GRUB menu is what I need to have come up.

I know this is a Linux question but is there a Windows way to make Windows offer me a choice of which partition to use at boot?

Thanks

:)

 

Deleting Grub GNU

I had installed Ubuntu as a dual boot option on my laptop. I have since deleted it but no matter what I have tried I can not get the grub loader off my computer. I have tried the following:

used disk manager to delete the Ubuntu partition

tried bootrec/fix mbr and fix boot

totally reset the PC deleting all files and reinstalling windows 10

Yet its still on my laptop. Windows loads fine but I would like still like the grub loader gone. I believe its in the EFI partition and am not sure if I delete the partition through "diskpart" if it will cause problems when booting the system and if I can
reinstall the EFI that's supposed to be there.

 

Dual boot with Ubuntu

Are you booting from a Grub loader or from the win loader? It will not delete the Ubuntu partition or data but you may have to re-install the loader if it is Grub/Ubuntu

 

Make Windows 10 Bootloader Override Windows 7 Bootloader/GRUB


Now after running into two different grub errors, my PC refuses to boot from anything. First I got the grub error no such partition, so I booted from Ubuntu 17.10 install disk and reinstalled Ubuntu 17.10, removing the previous installation of Ubuntu 17.10. After resinstalling, I booted once, and grub appeared normally, I think I also booted into Windows 10 from grub and ever after that, I can no longer boot period. I get this:

GNU GRUB version 0.97 (593K lower / 523264K upper memory)
[ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ]

I've tried booting from Windows 7 & 10, Ubuntu 17.10, 18.04 & DBAN (hdd wipe) disks with no success. Now what? (trying the grub commands from this link:

How to recover lost GRUB bootloader in Linux

didn't work).