Problem

1. [Day 0] Windows and macOS error “Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key”
2. [Day 1] Windows didn’t boot. It boots to Linux Disk.
3. [Day 1] Was able to see files in Windows disk from linux.
4. [Day 2] [Maybe SSD Controller Fail or Corrupt firmware ]
   1. [Since reverting to older BIOS and using Linux Disks App to ‘Check filesystem’]
   2. Windows SSD shows as “Sandisk Milpitas SSD” not usual “WDC randomnumbers” and Linux is showing it as 16 KB (it’s 240GB) and SMART is not supported.

What I tried

[Day 2] [To Fix Windows] these command from windows USB installation shows

"Total identified Windows installations: 0"

bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd

diskpart is not listing the SSD

[Day 3] [To Fix SSD] leaving SSD plugedin in BIOS without SATA data for an hour

Zeroing Out

1. BIOS setting isn’t the problem: BIOS can see my disks (CMS not UEFI). Tried RESETing my BIOS.
2. It’s not SATA Cable: Tried switching SATA (data) cable used for linux disk windows disk.
3. I tried boot select key to make sure I am boot to windows, also tried unplugging all other disks.

What Happened

1. Windows 11 FROZE so I force shutdown it.
2. Without retying to reboot I went to UEFI and I INCREASED RAM SPEED to 2666 (below XMP).
3. Recent Error - For a week I had to force shutdown via powerbutton and windows took forever to shutdown.

SSD health

Now after switching to old bios (day 2 of error)

:~$ sudo smartctl -a /dev/sda
[sudo] password for lucas:         
Sorry, try again.
[sudo] password for lucas:         
smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.17.0-14-generic] (local build)
Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     Sandisk Milpitas SSD
Serial Number:    [No Information Found]
Firmware Version: 0.00
User Capacity:    16,384 bytes [16.3 KB]
Sector Size:      512 bytes logical/physical
Device is:        Not in smartctl database 7.3/5528
ATA Version is:   ATA/ATAPI-6 T13/1410D revision 1
Local Time is:    Tue Mar 10 12:43:42 2026 IST
SMART support is: Unavailable - device lacks SMART capability.

A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options.

Day 1 of error, files were viable from Linux)

Linux ‘Disks App’ was showing Windows’ disk as “DISK IS LIKELY TO FAIL SOON” but not for macOS Disk.

# Not able to boot windows USB installation (Fixed switching to Old BIOS)

I was able to boot old Windows version maybe 24H2 now it just keeps loading via ventoy

25H2 via ventoy shows “Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert you Windows installation…”

dd command is not suported for windows `sudo dd if=/path/to/windows.iso of=/dev/sdX bs=4M status=progress`

Observation

1. [Sometimes] Setting BIOS to UEFI only, BIOS Doesn’t See Windows and macOS DISKS , even though all disks are GPT.

Recent Changes

1. Updated to Windows 11 25H2 (https://www.tomshardware.com/pc-components/ssds/new-report-blames-phisons-pre-release-firmware-for-ssd-failures-not-microsofts-august-patch-for-windows). I have been using factory firmware.
2. [I have switched back] About-a-week back updated BIOS, it’s beta. It worked normally for 4-5 days.
3. Update Motherboard chipset driver.

Setup

1. I have 3 separate disks for Windows 11, Linux, macOS.
2. Hardware B450, R5 3600, 16GB 3000Mhz.

BIOS Settings

reset UEFI to default and

1. Turn on SATA hotplug.
2. Turn XMP and RAM speed to 2400.
3. Switch from UEFI to CMS (I know I should use UEFI only but earlier my Linux was MBR).
4. Turn off TPM.