Mbr2gpt inaccessible boot device Install the latest AMD RAID driver from Gigabyte's support site (9. Jun 7, 2023 · Mbr2gpt. May 7, 2025 · Use MBR2GPT. This tutorial offers efficient ways to resolve the inaccessible boot device issue on Windows 10 SSD, and also analyzes possible causes for the problem. Go to Tools and start the Command Prompt utility. 2 256GB Samsung XP941 SSD, my boot drive with Windows 10 installed, with a 1TB 970 EVO Plus. There are efficient ways to fix this problem and restore Windows 11's usual functioning. EXE to convert a disk from the Master Boot Record (MBR) to the GUID Partition Table (GPT) partition style without modifying or deleting data on the disk. 1 mobo, and I’m trying to add a SATA RAID to it. Dec 20, 2024 · Hello, A computer can no longer boot on Windows. This is on an MSI X99S SLI Plus motherboard that was recently upgraded to the la Sep 21, 2023 · This tutorial provides efficient ways to resolve inaccessible boot device on Windows 10 SSD and analyzes possible causes for the problem as well. #1 – Remove Recently Installed and Pending Mar 10, 2025 · For Windows11 prep, I am trying to convert my hdd to gpt on my Windows10 system. This guide walks you through why it happens and how to fix it step by step. Nov 9, 2021 · Inaccessible Boot Device error on Windows 10 or 11 is a “blue screen of death” (BSOD) error that stops Windows from booting properly. Nov 11, 2025 · Enable Secure Boot carefully, verify each step with the system tools (msinfo32, tpm. This error might occur after some changes are made to the computer, or immediately after you deploy Windows on the computer. Dec 8, 2024 · Hi, I actually didn't think it was an intel issue, but after some researches I found out that there were multiple request about the inaccessible boot device on the intel community, so I just wanted to try my shot. This issue affects many users, especially during system installations or migrations. We will also provide eight proven Jul 25, 2024 · Steps to Fix the Inaccessible Boot Device BSOD First of all, you need to boot into the recovery environment. Oct 6, 2016 · I tried converting my system disk from MBR to UEFI with gptgen. This detailed tutorial will explain the "Inaccessible Boot Device" error's causes. exe," it's likely related to the operation of that utility Mar 23, 2025 · This is an answer to what question? - Why you don't have a recovery partition???? or - I see you have Ventoy on one of your drives. This not only comes in handy while creating Nov 7, 2025 · The Inaccessible Boot Device Windows 11 problem may aggravate and prevent your machine from starting. It shows a blue screen with INACCESSIBLE_BOOT_DEVICE message. now I can't boot to windows. Once the disk is the non boot disk you should be able to change partition type. This issue typically arises when Windows is unable to read the system partition during startup, preventing access to the operating system. See full list on learn. Corrupt Boot Files: Essential files needed for booting Windows may be damaged or missing. In this article, we’ll take a comprehensive look at the possible causes of the inaccessible boot Dec 24, 2024 · Want to fix the inaccessible boot device error in Windows PC? Here are the best solutions you can try to fix your boot device and get access to your Windows PC. Reboot. Don't have enough Rep to post images but basically Dec 8, 2024 · Hi, I actually didn't think it was an intel issue, but after some researches I found out that there were multiple request about the inaccessible boot device on the intel community, so I just wanted to try my shot. What’s driving me crazy is that every single storage modification I’m trying to apply, completely and utterly bricks Windows New comments cannot be posted and votes cannot be cast Jul 16, 2024 · I own an Acer Nitro5 515-75 gaming laptop and lately I got obsessed with lowering its CPU voltage due to insane overheating. Driver Problems: Incorrect or outdated storage drivers can cause Windows to fail in recognizing the boot device. Jan 15, 2025 · I read your question, and I understand that the issues you are experiencing with "Stop Code: INACCESSIBLE_BOOT_DEVICE" and "PC did not boot properly" usually means that your computer cannot access the boot device, which could be caused by a BIOS setup change, a hard drive problem, a corrupted OS boot file, or other hardware problem. exe" is a specific utility provided by Microsoft as part of Windows 10, starting with version 1703, which allows users to convert a disk from MBR (Master Boot Record) to GPT (GUID Partition Table) without data loss. Insert the USB drive and boot your computer from it. Just before, it applied the latest Windows updates and I made a gpupdate to test GPO (the only modified GPO was to apply Bitlocker on the OS… Nov 19, 2024 · Hi, I actually didn't think it was an intel issue, but after some researches I found out that there were multiple request about the inaccessible boot device on the intel community, so I just wanted to try my shot. Oct 4, 2024 · The Inaccessible_Boot_Device BSOD error has an error code of 0x7B. I restarted my laptop and pressed F2 to access the BIOS, and from there I switched to UEFI. In the Command Prompt window, type the following command: chkdsk C: /f /r /x (Replace C: with the letter of the drive where Windows is Aug 2, 2023 · Hello there, "MBR2GPT. Dec 9, 2018 · You should be able to boot a GPT disk even if you aer not starting in UEFI mode. Apr 16, 2025 · If you’re trying to convert your disk from MBR to GPT using the MBR2GPT tool and you run into the dreaded “MBR2GPT failed” error, don’t panic. Turning off your system due to the Inaccessible Boot Device BSOD can feel overwhelming, but understanding the problem and knowing how to diagnose it is half the battle won. Oct 24, 2021 · Some solutions using the "d:\Windows /s <boot letter>: /f UEFI" command such as these: [SOLVED] Windows 10 Bootrec /rebuildbcd and /ScanOS say 0 Windows Installations detected. Dec 26, 2021 · Hard drive not recognised after running MBR2GPT - cannot boot computer Hello all I am desperate. I can boot the drive using the USB enclosure I used to close the HDD to the NVME m2 drive on. Windows Central and other tech outlets offer tested, step‑by‑step guides for using MBR2GPT. If my request bothers anyone here, I will gladly delete it Feb 11, 2025 · Resolve inaccessible boot device errors with step-by-step guidance, uncover the root causes, and learn how to protect your data during recovery. Navigate to Troubleshoot > Advanced options > Command Prompt. Here's how to fix it. MBR2GPT /allowfullos /convert Reboot into Bios Change to UEFI boot Reboot 20 machines have worked with this process without issue, but I've had two the will come up with Inaccessible_Boot_Device blue screen errors when it tries to boot from the SSD. , Or if you run "bcdedit" and you see "The boot configuration data store could not be opened. Feb 2, 2024 · Hello, Got a Gigabyte TRX40 Designare v1. Solution (workaround): There have been only 2 ways to get Windows to boot: This go around, I enter the Bitlocker Recovery key, it goes to the Windows 10 loading screen (spinning dots) and after about 15 seconds I get a BSOD stating 'Inaccessible Boot Drive. Run the following commands one by one: diskpart DISKPART> list disk At this step, find the disk that you are going to use as a restore destination for the primary operating system. DISKPART> select disk 0 Mind Nov 19, 2024 · Hi, I actually didn't think it was an intel issue, but after some researches I found out that there were multiple request about the inaccessible boot device on the intel community, so I just wanted to try my shot. May 11, 2023 · MBR2GPT: Before the new system can boot properly you need to switch the firmware to boot to UEFI mode! I then went into the bios and changed to UEFI and enabled Secure Boot but Windows was unable to boot. Read this post to find reasons with 11 fixes for easy troubleshooting. But at times, when the reason is unknown, you might need to try several methods. 0. It still shows the drive under Legacy but not as a UEFI option, if I try to manually boot from the SSD it will either just be a black screen or it will BSOD and say inaccessible boot device or something of the sort. Oct 22, 2024 · The “INACCESSIBLE_BOOT_DEVICE” Blue Screen of Death (BSOD) error indicates that Windows has lost access to the system partition during startup. I wanted to post a couple of the more helpful links with comments. Does it has Minitool or AOMEI Partition or Diskgenius? I didn't mentioned MBR2GPT tool that probably don't work because you don't have the Recovery partition. Apr 27, 2020 · Boot from the Veeam Recovery Media. Oct 15, 2025 · If you are seeing the inaccessible boot device BSOD error on Windows 11 or 10, we have several solutions to fix the issue easily. came accross this BIOS mod on youtube which would unlock an advanced version of the standard factory BIOS. Nov 12, 2025 · Getting past the “Secure boot must be enabled” block for Battlefield 6 is, for most modern PCs, a solvable firmware and partitioning task: validate your current state, back up, convert MBR to GPT only after validation (use mbr2gpt when appropriate), enable TPM and UEFI in firmware, then enable Secure Boot and verify in Windows. For that, Click on Troubleshoot > Advanced options > Command Prompt. Sometimes, it won’t let you boot into Windows at all, which can be a little bit unnerving. Hello, When I try to power on or restart the laptop, I first receive the error: Your… Now, it’s saying I have an inaccessible boot device, and this happens when I tried it with both my SSD an a HDD. 3 days ago · My Windows 11 PC shows BSOD with INACCESSIBLE_BOOT_DEVICE error 0X7B at startup; seeking possible causes for this issue. msc, mbr2gpt validation, Confirm‑SecureBootUEFI) and keep your recovery keys close — that single precaution separates a smooth security upgrade from an emergency recovery event. Microsoft provides the MBR2GPT utility to convert without wiping the drive — but follow the documented procedure and back up first. After I ran mbr2gpt /convert /disk:0 /allowFullOS A third par Bot VerificationVerifying that you are not a robot Dec 8, 2024 · You switched from Legacy to UEFI? And you did the MBR2GPT conversion? Doc (not an Intel employee or contractor) [Fear and the desire for control are primary motivators for shadow dwellers. Nov 12, 2025 · If the system disk is MBR, Windows needs UEFI/GPT to use Secure Boot. Jan 20, 2025 · Stop Code ‘Inaccessible Boot Device’ on Windows 11: 17 Fixes and 5 Checks to Do Experiencing a stop code like ‘Inaccessible Boot Device’ on your Windows 11 machine can be a frustrating encounter. Jun 14, 2024 · Fixing an inaccessible boot device in Windows 11 can seem daunting, but it’s usually easily fixed. Luckily not all hope is lost. The system cannot boot into Windows under any circumstances. . Follow these simple steps to get your computer booting up properly again. (See image) Oct 5, 2021 · Windows not booting after converting from mbr to gpt Basically I changed from mbr to gpt using minitool partition wizard because I wanted to change to uefi because boot times was getting long lately with legacy, and now windows isn't booting I get a black screen with underscore blinking on the top left side of the screen. Oct 29, 2024 · Are you experiencing the INACCESSIBLE BOOT DEVICE error on Windows 10? Follow this tutorial for a possible fix. Currently in UEFI boot. The “Inaccessible Boot Device” error is prompted when the Windows operating system is unable to access the boot device (usually the hard drive or SSD) where system files are stored. It's used in the context of disk partitioning and booting. I'm getting blue screen saying "inaccessible boot device". Choose your language and click Next, then select Repair your computer. Oct 28, 2021 · How To Fix INACCESSIBLE_BOOT_DEVICE Windows 10 Error? There are several methods that could solve the INACCESSIBLE_BOOT_DEVICE problem within minutes. Jan 3, 2025 · Create a bootable Windows 10/11 USB drive if you don’t have one. Reboot into UEFI/BIOS and enable UEFI/GPT mode. Convert a disk from MBR to GPT partition style. Sep 25, 2025 · The inaccessible boot device Windows 11 error, also common in inaccessible boot device Windows 10, can be fixed by checking hardware, using WinRE for repairs, and rebuilding BCD/MBR. Any ideas? I was going to trying clearing the TPM via the BIOS, but the switch is grayed out. ] Jan 19, 2025 · Please, help me. f. net/wiki/bcdedit/#Commands_and_parameters for more info on bcdedit) Mar 14, 2025 · How to Fix Inaccessible Boot Device Windows 11 Step 1: Restart Your Computer Before diving into technical adjustments, perform a simple restart of your computer. microsoft. In this guide 6 days ago · Call of Duty: Black Ops 7 on PC blocks launch until Secure Boot is enabled (and TPM 2. Here, you need to execute some commands to fix the issue. Mar 16, 2025 · Windows11の更新備忘録 Windows11への更新でかなり労力を使ったので備忘録です 一人でも多くの人のサポートになれれば・・・ ・目次 0．前提 1．準備 1．1．パーティション形式の確認方法 1．2．回復パーティションの確認方法 1．3．BIOSの確認方 Feb 12, 2022 · I enabled the UEFI and disabled the Secure Boot For last effort (assumed the software correctly convert everything including creating boot for your Windows with EFI system), on BIOS would you like to check the boot order and make Windows as the first boot. This is Tried to clone HDD to NVMD ssd - Getting "Boot device inaccessible". However the command failed and I obtained the following "Cannot create EFI system partition" (error 0x000036B7), and now I'm unable to boot into windows (Reboot and Select Proper Boot Device errpr). The internet is full of advice on how to handle this. For some reason Windows thinks the boot disk is gpt. It tells you how to fix it. Sep 18, 2022 · Computer Not Booting after MBR2GPT CMD, Can't Find UEFI Boot/Legacy BIOS, Please Help! Oct 1, 2024 · It seems that more often than not, when I restore a computer, I encounter stop code 7B or worse, just a white-on-black message that no OS was found. exe and the conversion was completed successfully. Secure Boot verifies trusted bootloaders and drivers at startup, which anti-cheat systems rely on to prevent low-level tampering. In this example, we assume that disk 0 is a restore destination for the primary operating system. Changes in hardware configuration: Adding, removing, or configuring new hardware (especially storage devices) can trigger conflicts. It said it was successful but now it won't boot back in. On the new laptop. Jun 16, 2023 · The “Inaccessible Boot Device” BSOD error is more prominent with users who recently updated their Windows or performed a clean installation to upgrade the OS. Mar 16, 2025 · Are you tired of being stuck in an endless loop of frustration, with your computer constantly rebooting due to an “inaccessible boot device” error? You’re not alone. I wanted to upgrade to Windows 11 from Windows10 and I was getting the error you get when running a legacy BIOS. The simplest way to do it is to remove the disk and take it to another computer, or to boot into Linux from a USB drive. Nov 19, 2024 · Hi, I actually didn't think it was an intel issue, but after some researches I found out that there were multiple request about the inaccessible boot device on the intel community, so I just wanted to try my shot. I'm desperate. You can convert the drive from MBR to GPT (using Minitool or AOMEI Partition or Diskgenius) and then Jun 13, 2025 · Getting the Inaccessible Boot Device error? Check the hard drive connections, perform a system restore, or convert the disk to GPT. Jan 19, 2025 · Please, help me. I ran the command, got the common readout along the lines of: &quot; MBR2GPT: Attempting to validate disk 0 MBR2GPT: Retrieving layout of diskMBR2GPT: MBR2GPT: Validating layout, disk sector size is: 512 bytes … Hi all, I tried to run the mbr2gpt /convert command on my C partition in an attempt to enable secure boot and install windows 11. To note, if you are using a tool like bootrec /rebuildbcd and you get "The requested system device cannot be found. As a test you could try creating a new vm and attach just the boot disk to see if it works. exe /convert command, and get "failed to update reagent. xml". Hard Disk Partitioning Solutions Read the following articles to safely manage hard disk partitions and optimize Windows PC performance without data loss. Alternately, is this an excuse for a new SSD. https://neosmart. exe will convert a Windows 11/10 computer from legacy BIOS to UEFI disk partitioning. com Jun 20, 2024 · If you are unable to boot Windows after converting MBR to GPT, you can pay attention to this post. I saved and the changes and exited the BIOS and got the message "No bootable device -- Please restart system". Oct 23, 2024 · If you've encountered the Inaccessible_Boot_Device error in Windows 11, don't panic. 2. I have prioritized the list according to the top solutions mentioned by users who faced this problem. exe is a new built-in Windows 10 console tool that allows you to convert a disk with the MBR (Master Boot Record) partition table to a GPT (GUID Partition Table) without data loss and without the need to delete existing partition. After detaching all the gpt disks, the mbr boot disk could boot. The mbr2gpt tool can be used to convert the partition table both in Windows PE (Windows Preinstallation Environment) and directly from the running Windows 10 Mar 9, 2023 · MBR2GPT. Oct 22, 2025 · On Windows 10, you can use the MBR2GPT tool to convert a drive using MBR to GPT to properly switch from BIOS to UEFI without reinstalling the operating system or losing your files. 0 is available) in your system’s UEFI firmware. Dec 1, 2022 · After this i needed to do the mbr2gpt convert so as to enable secure boot, which i used available software which claims to be able to do the convert whilst still logged into windows 10. The operating system cannot reach the boot device, creating booting problems. This issue can be caused by a variety of factors, including disk corruption, driver issues, and even hardware problems. I've tried some troubleshooting and was wondering if anyone had any way of getting me back into my system since I'd really rather do nothing less than reinstall Windows alongside all of my games and mods. I do Nov 13, 2024 · The "inaccessible boot device" error is one of the scariest blue-screen-of-death errors because it generally prevents you from booting into Windows. Aug 24, 2021 · I ran mbr2gpt. Sep 17, 2025 · The “Inaccessible Boot Device” error on Windows 11 can seem scary, but with a systematic approach — from checking drivers to repairing boot files — most users can fix it without reinstalling Windows. Aug 27, 2024 · If you receive INACCESSIBLE_BOOT_DEVICE Blue Screen after you have upgraded to Windows 11/10, then this posts suggests ways to overcome the issue. It has: M2Q: WDS500T3X0C-00SJG0 - NVMe boot drive M2M: WDS100T3X0C-00SJG0 2 x BluRay SATA drives The boot drive was never RAIDed and I’m not trying to make a bootable RAID. INACCESSIBLE BOOT DEVICE As you understand, I long gave up of trying to make "my" Windows installation boot. If you are facing issues with "MBR2GPT. Jul 21, 2022 · First my system (as it is now): Gigabyte Z690 Gaming X DDR4 (BIOS Version F8b) Intel i7-12700F 32GB Corsair memory Windows 10 Pro with all updates Samsung 840 EVO 250GB (as boot drive) Samsung 870 6 days ago · Hello, laptop is stuck in a repeated boot failure loop involving BitLocker and multiple stop codes. Oct 14, 2025 · To convert from MBR to GPT for Windows 11, open WinRE, launch Command Prompt, run the "mbr2gpt /validate" and "mbr2gpt /convert" commands. Hardware Changes: If new hardware is added or existing hardware is modified (like changing a hard drive), the device may not be detected. May 15, 2025 · If you’ve recently converted your disk from GPT (GUID Partition Table) to MBR (Master Boot Record) format and encountered the dreaded "No Bootable Device" error, you’re not alone. The above bricks any brand-new Windows 10 installation I perform on this system. Jan 18, 2025 · so I run the mbr2gpt. One thing to keep Apr 9, 2021 · I've replaced my old m. Dec 8, 2024 · Hi Leon, Can you explain what do you mean by setting BIOS boot mode right? Like setting the ssd in first in the priority booting? Thank you by the way for suggesting solutions May 30, 2024 · Diagnose and fix the INACCESSIBLE BOOT DEVICE stop code, which results when Windows can't boot from your drive. Nov 19, 2021 · According to How can I migrate a Windows 10 from BIOS/MBR boot to UEFI/GPT without reinstalling? I can convert my system disk to GPT without reinstalling and losing data using the MBR2GPT tool, pro Nov 13, 2023 · Set up EFI boot partition using bcdedit (Boot Configuration Data editor) (c. If it does work, your can try out the mbr2gpt tool to see if it helps. May 25, 2017 · I restarted my PC when it requested it and now it is saying that my boot device is either "unattached or inaccessible" and I can't access my PC. Oct 17, 2023 · 報錯：Inaccessible Boot Device 無Windows 10 SSD無法訪問開機裝置是最常見的 BSOD（藍屏死機） 錯誤之一。有些使用者在升級SSD後在啟動時遇到了這個問題，而有些使用者在重設電腦後出現了這個問題。更糟糕的是，一些使用者陷入無休止的開機迴圈中，Windows告訴他們SSD無法存取，嘗試修復錯誤但不斷失敗 Dec 2, 2024 · The ultimate guide to resolve the 'INACCESSIBLE_BOOT_DEVICE' Error in Windows 11. The files are all still in place when I pulled the drive and looked at it with another machine. I ran the mbr2gpt command and got the common readout along the lines of: " MBR2GPT: Attempting to validate disk 0 MBR2GPT: Retrieving layout of diskMBR2GPT: MBR2GPT: Validating layout, disk sector size is: 512 bytes MBR2GPT: Trying to shrink the OS partition Sep 29, 2023 · Please let me know if you can help, I can also see the partitions so I'm not sure why it won't boot from there. Long story short it works, problem is, I might have set Jul 4, 2025 · Corrupted or outdated device drivers: Faulty or incompatible storage controller drivers can make Windows unable to communicate with the boot device. can this still be saved? Aug 17, 2025 · Fix MBR2GPT disk layout validation failed, cannot find OS partition, non system disk, cannot install new boot files, EFI system partition errors in Windows 11/10. What Is MBR2GPT? MBR2GPT is a built-in Microsoft utility that converts a disk from Master Boot Record (MBR) to GUID Partition Table (GPT) without data loss. Mar 22, 2021 · MBR2GPT is an excellent tool to convert a disk from Master Boot Record (MBR) to the GUID Partition Table (GPT). Let us begin. Facing the dreaded "Inaccessible boot device" error on your PC? Check out this guide to see how to fix it and get your PC working once again. Following the instructions discussed in the post. 127). After the conversion, I am unable to boot from the hdd - it does not show up in the list of UEFI boot devices. May 20, 2025 · Stop code Inaccessbile Boot Device in Windows 11 can occasionally occur with a blue screen. I’m wondering if this is because of the new hardware, or a setting in the BOIS I need to adjust. 3. After that, Access Command Prompt. I had this problem with vms that had a mbr boot disk and gpt for other disks. In this comprehensive guide, we’ll dive deep into the causes of this problem, the implications of changing partition styles Oct 9, 2017 · Before I ran mbr2gpt my Windows 10 PC had MBR partition with two volumes: one System Reserve partition (2G), one OS partition(236G). on the old laptop, I get a black screen with a single dash flasing, btw I already changed boot from legacy to UEFI. You’ll need to check your hardware connections, update your drivers, and repair your system files. okha dtmj qnvyyfz gcfd plb gbwt xkfne tcxnzfiv ivun kibc rkijs qygv inyt fyalgcmr zjgow