Windows dual boot issue

[signal falcon]

Hey there,
I wanted to try out Linux so installed Linux mint. Having 4 drives, with 2 being windows boots (10 and 11) I decided to fully wipe one (10) by selecting "Erase disk and install Linux Mint" as "Install Linux Mint alongside Windows Boot Manager" was only giving the option to partition the drive which I didn't want to do.
Got it installed then eventually got to installing steam and trying to add my windows steam drive which it wouldn't let me due to some permission issues, I went down a rabbit hole on this and figured I needed to add the drives to fstab but this wasn't allowed as the windows didn't have fast boot disabled which is when I tried to boot into Windows but now I have no option to boot into Windows via bios. Windows is also missing from grub.
Anyone have ideas?
I heard maybe I should try the windows installation media for Startup Repair but not sure if that will end up messing up Linux mint and/or the windows further.

850 EVO disk is the Linux mint drive
980 EVO PRO is Windows 11 drive

[pliant gyro]

make a bootable usb with Supergrub2. make sure u use gpt mode

see #1295728709306683482 for how to make a bootable usb

use the ventoy tool to do so from Linux

once made, you can boot up supergrub through that

and use it to boot Windows

once in Windows, shut down fast startup

[signal falcon]

Thanks for the quick reply, I'll work on it and get back

[pliant gyro]

see #1200928716415566005 message

for the right supergrub to get, shown as picture, red writing

you'll notice it comes as a .zip. it must be extracted. then copy the .img to ventoy

[signal falcon]

Just to make sure, I specifically want "Super Grub2 Disk 2.06s2-beta1" yes?

[pliant gyro]

whatever version is current

which says works for uefi and bios, and is meant for usb booting

It seems either Windows was set up for legacy boot

there is no EFI partition at start on this drive.

compare to the linux one

so u may just be able to boot windows from bios, picking nvme1n1 (samsung 980 pro) as the boot device

cuz it's probably legacy-boote

or not

[signal falcon]

I can only see the linux drive as a bootable hard drive in the bios :/

[pliant gyro]

is it win 11 on nvme1n1?

[signal falcon]

yep

[pliant gyro]

so win 11 mandates uefi mode

so probably the efi partition got wiped, and it was using another drive to boot win 11

ie : ur win 10 drive

try booting thru supergrub, make sure to launch supergrub in uefi mode

[pliant gyro]

how big size is ur usb stick?

[signal falcon]

128gb

[pliant gyro]

good.

[signal falcon]

I'm new to ventoy so just figuring it out sorry

[pliant gyro]

did u find the manual's instruction thing? from this server?

[signal falcon]

I tried searching for ventoy and boot but didn't find any thread

[pliant gyro]

you'll need 3 things on that ventoy big usb.

• supergrub to let u boot temporarily to windows
• win 11 ISO to fix up a new efi partition
• linux mint ISO in case need to boot repair tool for linux

[pliant gyro]

"how to make a bootable installer usb"

fifth or 6th article at top

[pliant gyro]

dont search,

[pliant gyro]

.

make sure for newer pc

no

[knotty bluff]

oh

[pliant gyro]

he needs a multiboot stick

[knotty bluff]

oh srry

[pliant gyro]

to fix up all the major screwups

[signal falcon]

This one I presume then

[pliant gyro]

yes

[pliant gyro]

.

[signal falcon]

So I ignore

Go to Options menu, and if your computer is 2014 or newer choose Partition Style: GPT for best results!```
And keep it as MBR?

[pliant gyro]

how old is ur computer?

[signal falcon]

is this based off motherboard?

[pliant gyro]

ofc

i mean if it runs win 11 it must be recent

[signal falcon]

its running a 7700x can't remember the mb

okie doke

[pliant gyro]

in terminal, do inxi -M

it will show the bios /uefi year

[signal falcon]

amazing:
Type: Desktop Mobo: Micro-Star model: MAG B650 TOMAHAWK WIFI (MS-7D75)
v: 1.0 serial: <superuser required> UEFI: American Megatrends LLC. v: 1.70
date: 08/10/2023

[pliant gyro]

the problem with using mbr is in some cases, the uefi refuses to recognize the stick as bootable/valid

not all cases, but definitely some

[signal falcon]

okay so gpt for now and if it doesnt work restart with mbr

[pliant gyro]

it'll work dont worry

[signal falcon]

you want me to run clear ventoy here?

[pliant gyro]

something from 2023 probably wont even boot legacy

[pliant gyro]

no

that's just there to show when ppl screw up the partition style. u have to clear and redo

[signal falcon]

okay ventoy set up, I assume I need to gather those bootable ISOs now

I believe that's all the files set up.
So I boot into super grub which should let me go into windows if want to temporarily
But if I want fix the boot permanently I'd want to use the win 11 iso to run a repair?

[pliant gyro]

What you'll want to do is eventually make an efi partition near the start of nvme1n1

this can be do using gparted from mint live. however, first test supergrub and windows

[signal falcon]

Alrighty, so try out supergrub to see if windows boot works then head back to mint to do this?

[pliant gyro]

yep

[signal falcon]

ty ty brb

[pliant gyro]

Ideally, this is how it should be. you gotta shrink the ntfs partition by 250 megs, then shift it over right,

n shift pt'n 1 also to right

to make room for new green, ESP

and when u set that ESP up, REMOVE the linux drive from motherboard temporarily

then u can fill it with the stuff to make windows boot. shown here: https://youtu.be/CZ17JrgFFhw?t=548 (9:08) CyberCPUTech vid on how to fix trashed Windows EFI partition

anyways, did u boot into windows yet, thru supergrub?

[signal falcon]

Got a quick hiccup. Might be related to the fact that I setup mint with secure boot maybe?
I'm in boot menu with 2 usb partitions

1. Does nothing
2. Opens
   With
   "Verification failed: (0x1A) Security Violation" then goes into MOK management

[pliant gyro]

oh so go into it

if not, u may need to restart again the usb

do enroll key

[signal falcon]

I did see that in the usb

[pliant gyro]

go back to blue screen

https://youtu.be/CuonyS3xdwg?t=303 <<5:03 ThioJoe Ventoy Secure Boot enroll steps

[signal falcon]

Not a great message:
"Verifiying shim SBAT data failed: Security Policy Violation Something has gone seriously wrong: SBAT self-check failed: Security Policy Violation"

(when selecting super grub via ventoy)

Should I maybe try to follow something like: https://askubuntu.com/questions/1523438/verifying-shim-sbat-data-failed-security-policy-violation/1523439#1523439

[pliant gyro]

turn off secure boot then

[signal falcon]

Okay I'm super grub

Detect and show?

[pliant gyro]

that or manually boot

and choose windows 7 (and up)

[signal falcon]

Nothing detected under windows vista and newer

[pliant gyro]

well i guess scan for all

if nothing, backup all ur windows data u need, from linux hopefully, or from hirens boot cd ISO, and reinstall Win 11 fresh (with mint drive REMOVED)

[signal falcon]

It just comes back with the drives under (Disks and Partitions) chain loading but not sure if that means anything

[pliant gyro]

So in other words it can't boot it?

[signal falcon]

Tried all the rows under the right drive and all failed to boot

[pliant gyro]

only uefi ones

not legacy. they must say uefi

[pliant gyro]

at this point, especially cuz u left fast startup on. this would be ur best bet

[signal falcon]

Hmm, any point in trying to "fix the uefi partition" or is it a list cause

Lost*

[pliant gyro]

the key points are: distinct and separate efi partitions, and win. fast startup off.

[pliant gyro]

if fast startup had been turned off before, u could make an ESP on the 980

but it may damage data possibly now idk