Please help! 0xc00000e - cannot boot


zaarin_2003

Member
Local time
12:07 AM
Posts
14
OS
Windows 11
Hi, when I boot I see the error

0xc00000e​

  • A blue screen with the headline "Your PC Needs To Be Repaired" with the text "A required device isn't connected or can't be accessed."
Choosing any of the available options either does nothing or reboots to the same screen.

Context: I recently migrated my Windows 11 from one drive to another. Essentially I made an exact copy of the old hard drive, an Intel Optane SSD, onto my second SSD, a Corsair MP510. I have been booting and using Windows 11 from the new drive fine for days. Both SSDs are still on the computer.

I decided last night to format the Optane. It had three partitions including the main partition, a recovery partition (700mb) and something else (100mb). Formatting it with either fast or slow format within Windows didn’t seem to work at all. So I cleaned it using DiskPart on Terminal (admin) and re initialised it using drive manager. It all seemed fine.

The next time I booted I see the BSOD.

I’ve checked the BIOS and it is still set to boot to the new drive under boot manager. Strangely the Optane I formatted doesn’t seem to be visible in BIOS.

I’m not sure if it’s relevant but the Optane, because I used to boot into Windows on it, before I copied everything to the other drive, was always listed in the BIOS with ‘Windows Boot Manager’ next to it. Was Windows still looking for files on it or was the computer still considering someone on it important even though I was booting to the other drive?

What has happened and what can I do?

Thanks
 
Last edited:

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    CPU
    i9 9900
    Motherboard
    Z390 Gigabyte Aorus Elite
    Memory
    32 Gb DDR4
    Graphics Card(s)
    nVidia 1070
    Sound Card
    Realtek
    Monitor(s) Displays
    Samsung 4k
    Screen Resolution
    4k
    Hard Drives
    Intel Optane 905p
    PSU
    600w
    Browser
    Edge
    Antivirus
    Microsoft Defender
In this video, i will guide you on how to fix "A Required Device Isn't Connected or Can't Be Accessed" error on Windows.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
Ahh, I remember in your other thread several members advised you to kick that optane drive to the curb.
You can try suggestions here but I suggest you reinstall your old drive.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 23H2 22631.3155
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 7080
    CPU
    i9-10900 10 core 20 threads
    Motherboard
    DELL 0J37VM
    Memory
    32 gb
    Graphics Card(s)
    none-Intel UHD Graphics 630
    Sound Card
    Integrated Realtek
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    1tb Solidigm m.2 +256gb ssd+512 gb usb m.2 sata
    PSU
    500w
    Case
    MT
    Cooling
    Dell Premium
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    so slow I'm too embarrassed to tell
    Browser
    Firefox
    Antivirus
    Defender+MWB Premium
  • Operating System
    Windows 10 Pro 22H2 19045.3930
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 9020
    CPU
    i7-4770
    Memory
    24 gb
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    256 gb Toshiba BG4 M.2 NVE SSB and 1 tb hdd
    PSU
    500w
    Case
    MT
    Cooling
    Dell factory
    Mouse
    Logitech wireless
    Keyboard
    Logitech wired
    Internet Speed
    still not telling
    Browser
    Firefox
    Antivirus
    Defender+MWB Premium
See if this video has any useful troubleshooting steps:





Create a bootable Windows 11 Media Creation Tool (MCT) (Windows 11 iso)


 

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
    Motherboard
    Product : 190A Version : KBC Version 94.56
    Memory
    16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
    Graphics Card(s)
    NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
    Sound Card
    IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
    Hard Drives
    Model Hitachi HTS727575A9E364
    Antivirus
    Microsoft Defender
    Other Info
    Mobile Workstation
Ahh, I remember in your other thread several members advised you to kick that optane drive to the curb.
You can try suggestions here but I suggest you reinstall your old drive.
Well, that’s what I thought I did! I moved (copied) my Os to the other drive and formatted the Optane. Unfortunately it seems that Windows boot manager or the master boot record, or something, didn’t like me doing that. That drive continued to appear in the BIOS with ‘boot manager’ next to it. And wiping it clearly mucked something up! Apparently I damaged the master boot record. I pulled the Optane physically out and did a clean install on the good drive using a usb. It didn’t take long and my files etc came to me from a back up the previous day.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    CPU
    i9 9900
    Motherboard
    Z390 Gigabyte Aorus Elite
    Memory
    32 Gb DDR4
    Graphics Card(s)
    nVidia 1070
    Sound Card
    Realtek
    Monitor(s) Displays
    Samsung 4k
    Screen Resolution
    4k
    Hard Drives
    Intel Optane 905p
    PSU
    600w
    Browser
    Edge
    Antivirus
    Microsoft Defender
In this video, i will guide you on how to fix "A Required Device Isn't Connected or Can't Be Accessed" error on Windows.
You cannot use the bootrec /fixboot command because the command is blocked in both Windows 10 (from version 1709) and Windows 11.

bootrec /fixboot ===> Access is denied.

edit: Both on GPT and MBR disk.

Access is denied.jpg
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo Yoga C940
    CPU
    Intel Core i7-1065G7
    Memory
    16GB
When using Command Prompt to fix boot-related issues, it is common to face the “bootrec /fixboot Access is denied” error. There are many possible reasons for this problem to occur on your computer. In this video, i will help you troubleshoot this error.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
@FreeBooter

There is nothing wrong with my computer.

Clean install Windows 10/11 and then try the bootrec /fixboot command.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo Yoga C940
    CPU
    Intel Core i7-1065G7
    Memory
    16GB
@FreeBooter

There is nothing wrong with my computer.

Clean install Windows 10/11 and then try the bootrec /fixboot command.
Then what is your problem, telling me bootrec does not work.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
@FreeBooter

I'm trying to tell you that your youtube tutorial is outdated because the bootrec /fixboot command can no longer be used.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo Yoga C940
    CPU
    Intel Core i7-1065G7
    Memory
    16GB
@FreeBooter

I'm trying to tell you that your youtube tutorial is outdated because the bootrec /fixboot command can no longer be used.
What, stop talking nonsense i can see you have not watched any of those two videos where i have shown how to use Bootrec /fixboot command.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
@FreeBooter

I'll stop here now because you don't want to learn anything new.

I was just trying to kindly let you know about a new feature in Windows 10/11.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo Yoga C940
    CPU
    Intel Core i7-1065G7
    Memory
    16GB
I don't need your misunderstanding information that you come up yourself and who said i need to learn anything from you, stop confusing people with your nonsense that holds no true.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
I haven't tested it myself but it seems it could be a genuine change: Redirecting

I had the same issue with the command Bootrec /Fixboot "Access is denied",

This only happens with Windows 10 1709 install media.

I tried the same command with Windows 10 1703 install media and do not get the error "Access is denied".

This looks like an error with the install media for Windows 10 1709

Regards

Mark
Bootrec is a holdover from the Windows 7 era.
 

My Computer

System One

  • OS
    Windows 11, Windows 10, Linux Mint XFCE, Linux Fedora Cinnamon
bootrec/ fixboot: It will write a new boot sector to the system partition by using a boot sector that’s compatible with your computer. You should run the command when the boot sector is damaged or replaced with a nonstandard boot sector.

A boot sector is the sector of a persistent data storage device (e.g., hard disk, floppy disk, optical disc, etc.) which contains machine code to be loaded into random-access memory (RAM) and then executed by a computer system's built-in firmware (e.g., the BIOS).

Usually, the very first sector of the hard disk is the boot sector, regardless of sector size (512 or 4096 bytes) and partitioning flavor (MBR or GPT).
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
That doesn't answer the question about wherever bootrec still works on builds greater than 1703, I'm not saying you're right or wrong, I'm just curious if this is actually true and wherever you've actually tested it yourself or someone else has?
 

My Computer

System One

  • OS
    Windows 11, Windows 10, Linux Mint XFCE, Linux Fedora Cinnamon
That doesn't answer the question about wherever bootrec still works on builds greater than 1703, I'm not saying you're right or wrong, I'm just curious if this is actually true and wherever you've actually tested it yourself or someone else has?
IF boot sector does not exist and does not get corrupted then why Microsoft still give us Bootrec /Fixboot command-line after all they can remove this command anytime they want if it has no use.

Also, i have been reparing PC and operating systems more than 25 years doing PC repair if i did not test it then what good am i as a PC repair Technician.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
IF boot sector does not exist and does not get corrupted then why Microsoft still give us Bootrec /Fixboot command-line after all they can remove this command anytime they want if it has no use.
That boot sector is there for legacy reasons only. You would have to ask Microsoft why they would return an error message rather than removing it completely. However, speaking from experience as a developer, sometimes that is easier said than done.

Also, i have been reparing PC and operating systems more than 25 years doing PC repair if i did not test it then what good am i as a PC repair Technician.
Okay, so you've tested it on a Windows 10 1709 build and it worked? That's all you had to say.
 

My Computer

System One

  • OS
    Windows 11, Windows 10, Linux Mint XFCE, Linux Fedora Cinnamon
I don't know what commands work as never needed to use as using image backups but the Dell site also mentions this,

Windows 11 and Windows 10 (Version 1709 and newer):​

  1. Rebuild the BCD store.
    1. First run the command below to back up the old BCD:
      ren BCD BCD.bak
    2. Now re-create it using this command:
      bcdboot c:\Windows /s <boot letter>: /f ALL (You can add a switch before /s for the computer locale: /l <language code>. By default, /l en-us English USA is used.)
    3. bootrec /rebuildbcd

 

My Computers

System One System Two

  • OS
    Win 11 Pro & 🐥.
    Computer type
    Laptop
    Manufacturer/Model
    ASUS VivoBook
    CPU
    AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
    Motherboard
    ASUSTeK COMPUTER INC. X509DA (FP5)
    Memory
    12GB
    Graphics Card(s)
    RX Vega 10 Graphics
    Monitor(s) Displays
    Generic PnP Monitor (1920x1080@60Hz)
    Screen Resolution
    1920x1080@60Hz
    Hard Drives
    Samsung 980 1 TB PCIe 3.0 NVMe M.2
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender
  • Operating System
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    ACER NITRO
    CPU
    AMD Ryzen 7 5800H / 3.2 GHz
    Motherboard
    CZ Scala_CAS (FP6)
    Memory
    16 GB (2 x 8 GB) DDR4 SDRAM 3200 MHz
    Graphics card(s)
    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Sound Card
    Realtek Audio. NVIDIA High Definition Audio
    Monitor(s) Displays
    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
    Screen Resolution
    1920 x 1080 (Full HD)
    Hard Drives
    Samsung 970 Evo Plus 2TB NVMe M.2
    PSU
    180 Watt, 19.5 V
    Mouse
    Lenovo Bluetooth
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender
I don't know what commands work as never needed to use as using image backups but the Dell site also mentions this,

Windows 11 and Windows 10 (Version 1709 and newer):​

  1. Rebuild the BCD store.
    1. First run the command below to back up the old BCD:
      ren BCD BCD.bak
    2. Now re-create it using this command:
      bcdboot c:\Windows /s <boot letter>: /f ALL (You can add a switch before /s for the computer locale: /l <language code>. By default, /l en-us English USA is used.)
    3. bootrec /rebuildbcd

BCDBoot is a command-line tool used to configure the boot files on a PC or device to run the Windows operating system.

You can't use it to repair damaged boot sector on a storage drive.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1
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