How To Fix Multiboot Systems | Windows & Linux

This video goes over how to fix multiboot systems when Windows overrides the bootloader and you lose Windows. This will also teach you how to remove Multiboot from a system.

[vram]

If MS really loved Linux, they'd make the Windows installer/bootloader Linux aware and add Linux file system support to Windows.

[winlen]

Great video Chris, really useful for those of us who still need certain Windows only software to get stuff done. A follow up video on multi-drive dual booting would be appreciated !

[TheKetsa]

Best way to multiboot is : one OS per drive.
No headache.

[cryptombt]

I had this problem recently, just had a hash of the bootloader. This video was excellent and resolved the problem. Your a fab guy Chris. Thanks bud

[roncallahan]

Thanks Chris, you've made this subject easier to understand.

[emjaycee]

Great video, Chris. I'm sure that will help heaps of people :) I ran into an issue yesterday and my solution wasn't as elegant lol. I had Elementary, Solus and Peppermint on one partition (legacy) and installed Neon over the Solus. When I rebooted it would only find Neon and Peppermint. I have tried MX Boot Repair before and somehow got it to work, but I didn't really want to take a chance on losing my Elementary and having to re-install, so I chickened out and re-installed Peppermint and Peppermint did find all three partitions thankfully. Can I assume using MX Boot Repair would probably have worked? When I'm multibooting Linux I do try to keep 'like with like' and it mostly tends to work. Occasionally though, things do go awry :) Keep up your great work, Chris, people love what you put out there and congrats on your 100K :)

[TVmadethemdoit]

Awesome! Very informative and useful. Thanks again Chris.

[PenguinRevolution]

If your duel booting on the same drive and wish to use Grub as your bootloader I always suggest installing Windows first. That way when you install Linux, Grub will be default and it should automatically pick Windows up which makes it simpler (if it doesn't Grub Customizer will work and you won't have to have to boot from USB). There are also ways to protect your Grub from the evil Windows Update.

[papperme]

Thanks a lot. Very Useful content. I had so much issue with double boot. Now it is much easier. I love your channel. You are a good teacher and good practical Linux content creater.

[DrewHowdenTech]

It's been a long journey, but you finally made it.
Congratulations on 100, 000 subscribers.

[bulosqoqish]

Very informative video. Thanks for providing it.

[yagamirex]

Best video on fixing grub in dual boot systems
I love it.

[debapriyoroy]

Congrats for the Century 🏏
100K ❣️❣️❣️

[eloquent]

Thank you, Chris! You saved a lot of my time)

[hotmasked]

This is a extremely helpful finally ! a video link this one!

[MrJcasilva]

excelente! this boot customizer really works! tks for the video!

[El.Duder-ino]

Thx Chris, but this is more like a dual boot guide instead of multi boot. It would be really helpful if u could come with some vid showing how to boot multiple OS'es using EFI with help with something like Clover bootloader or something similar to it. Multiboot on single drive is pretty cool and will gain in my opinion even more attraction in the future.

[abbiedogthree]

Great video, was just trying to figure this out. Now-next, multi-boot using EFI :D

[johngarcia]

I was about to do this, thank you, i use linux as my daily driver and i recently wanted to dualboot it with windows but i didn't know how to, thank u again

[RohitBanerjee]

Hi Chris,

Just subbed to your channel, but I havee been watching a lot of your videos for some time now. Even more so from last 3 weeks. If you notice a lot of views from India in the last 20 days, that's probably me ;)

Anyway, I'm in a tight spot. I have an HP Laptop (w/ AMD processor circa 2015) which has Windows 10. I recently used Macrium Reflect to copy image of my old mechanical HDD to a brand new SSD (420 GB). After that, I decided to have dual boot with Fedora 31 (specifically the Design Suite spin), since I'm a Red Hat guy from a long time (RHEL, CetOS, Fedora, etc.). In my initial attempt to install Live image through a boot USB, I got a lot of problems with the boot media erroring out on me. I tried tricks mentioned in your video on SuperGrubDisk2, and the RescaTux, with no results. I even tried the Windows "BOOTREC /FIXMBR" and "BOOTREC /FIXBOOT" but still no go. Then I finally had a Derp moment when I noticed that the Windows has to have "Active" flag on the OS partition, slapped myself hard and connected the SSD to another working laptop to set the C: drive to active and got Windows booting again. For some reason, though my laptop is supposed to support UEFI, it only works with legacy.
Now, after multiple unnecessary reinstalls of Fedora later, I still can't get Linux to boot automatically. I used EasyBCD with all possible combination to get the Linux to boot, but every time it sends me back to the "grub>" prompt. This is how my SSD is configured:

sda1 C: NTFS 300 GiB WIN10
sda2 /boot/efi EFI Sys Part 200 MiB BOOT
sda3 / ext4 50 GiB ROOT
sda5 swap swap 1024 MiB SWAP
sda6 D: NTFS 96.03 GiB DUMP

On the grub prompt, these are the commands I tried:

grub> set root=(hd0, msdos3)
grub> linux root=/dev/sda3
grub> initrd
grub> boot

I was able to boot Fedora and tried these commands in the terminal:
# grub2-install
grub2-install: error: doesn't exist. Please specify --target or --directory.

# yum install -y grub2-efi-modules
# dnf provides /usr/lib/grub/x86_64-efi
# dnf install -y grub2-efi-x64-modules
# grub2-install /dev/sda --no-floppy
# mount /dev/sda2 /boot/efi
# dnf install -y grub2-efi shim
# dnf reinstall -y grub2-efi shim
# grub2-mkconfig -o

Rebooted amd still no luck :'(

Where am I going wrong? Is it the BootManager in BIOS? Is it the partitions? Or is it the grub.cfg? Or is it the EasyBCD settings? I am really at my wit's (and my patience's) end.

PS. Really sorry for the long post ...