My Windows Boot Manager is gone!

  drpeppercan 05:23 27 Aug 2018

Hi all! I am setting up a dual boot system (Win10 & Ubuntu) in a 2 year old desktop pc. I had Windows 10 reinstalled just a couple days ago In my 1 Tb HD. Then I installed Ubuntu in my 120 Gb SSD. Then Grub was not found, so it would boot straight to Windows 10. Which I was expecting. Then I disabled fast startup in Windows 10, I forgot to disable fast boot in UEFI settings. I can't do the latter now because WBM is not available to boot from. Then I used bcdedit to set a new entry for Ubuntu: bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi (I can't recall where I got it from, but here they have a very similar tutorial[/link]). I had used this trick before and it worked. Then I rebooted, but instead of showing me Grub, it was a black screen with two lines of text: Reboot and Select proper Boot Device or Insert Boot Media in selected device and press any key. Then I went in the BIOS, and that's when I no longer saw Windows Boot Manager as an option! I booted off from Boot Repair Disk, and supposedly fixed Grub, but I still can't see WBM, and even though I do see Ubuntu in Bios, it still yields the above line of text (Reboot and Select...). But BRD generated a report, here it is.

Presently, and temporarily, I am only able to boot into Ubuntu or Windows 10 as long as I first boot off from a rEFInd Live USB drive. The rEFInd finds them both and allows me to choose.

Hopefully the BRD report can help you to see what's going on. The way I see it, I need to either remake/repair the MBR for Win10, or have it in the right disk. Something along those lines, I guess.

Thanks in advance!

  drpeppercan 16:29 27 Aug 2018

It's all good now! I just booted Win10 with Shift, then I went to Advd ops/Start-up Repair (Fix problems that keep Windows from loading). Strangely it said it was not successful. Then I went to UEFI Firmware Settings, but when I clicked that choice it only had a Restart button available. It brings you to the BIOS. But once there, in the Boot Options tab, there was nothing that would allow me to turn off/on Fast Boot. Windows Boot Manager was nowhere in sight still. Then I restarted, and Grub showed up! Along with the Windows choices too. So I no longer need to boot from the rEFInd USB drive.

I will have to find out for the next time, where should I tell Ubuntu to install the booting files? Assuming Windows has been installed already, and I'm installing Ubuntu on a separate drive.

Thanks guys!

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