Encountering error: 2101 Detection error on storage device (M.2) on laptop

Question

As the title says, I’ve been encountering the following error today as I try booting up my laptop. It happened yesterday as well, but went away after I powered off my laptop.

I can only go into the boot menu and BIOS, and BIOS my storage is not listed under config.

Can someone help? Thank you

Answer 1

Hi Vighnesh Dhasarath,

Welcome to the Microsoft Q&A forum.

The "2101: Detection error on storage device (M.2)" message appears before Windows loads, which means the system firmware (BIOS/UEFI) is having trouble detecting the internal SSD. When the drive does not appear in BIOS, Windows is not involved at this stage.

Here are some possible troubleshooting steps that you can try in this situation:

1, Perform a full power reset

• Shut down the laptop.
• Disconnect the power adapter.
• If the battery is removable, remove it for 30–60 seconds.
• Reconnect power and enter BIOS immediately to check if the SSD appears.

2, If the SSD appears even once

• Back up important data immediately.
• Intermittent detection can become permanent without warning.

3, Check the M.2 connection (if serviceable)

• Power off the device.
• Reseat the M.2 SSD and secure it properly.
• Restart and check BIOS again.

4, Update BIOS (only if the SSD is detected)

• Install the latest BIOS/firmware from the device manufacturer.

If the SSD never appears in BIOS, or the error keeps returning after reseating, this strongly points to a hardware issue with the SSD or M.2 slot. In this case, the next best step is to contact the device manufacturer or an authorized service center, especially if the laptop is still under warranty.

Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thanks for your effort.

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Answer 2

The error and the fact that the M.2 drive no longer appears in BIOS strongly indicate that the storage device is intermittently failing or has already failed.

Actions to take:

1. Power-cycle and recheck BIOS
   1. Shut the laptop down completely and disconnect the power adapter.
   2. If the battery is removable, remove it for 30–60 seconds, then reconnect.
   3. Power on and immediately enter BIOS/UEFI.
   4. In BIOS, check the storage or boot configuration page and confirm whether the M.2 SSD appears. If it still does not show up, the drive is not being detected at hardware level.
2. Check boot configuration (if the drive appears again) If the SSD intermittently appears:
   1. In BIOS/UEFI, open the boot configuration/boot order page.
   2. Ensure the internal storage/Windows Boot Manager is selected as a boot device and is at the top of the boot order.
   3. Save changes and reboot.
3. If Windows fails to boot but the SSD is detected If the SSD shows in BIOS but Windows will not start and reports missing OS/boot issues, repair the boot configuration:
   1. Create a Windows 10/11 installation USB using the official media creation tool on another PC.
   2. Boot the laptop from this USB.
   3. At the first setup screen, press Shift+F10 to open Command Prompt.
   4. Use diskpart → list disk to confirm the internal disk is visible.
   5. If visible, follow the documented steps to rebuild boot files (for example, using bcdboot or Bootrec /RebuildBcd) as described in the referenced articles.
4. If the SSD never appears in BIOS If the drive is consistently missing from BIOS/UEFI:
   • Treat this as likely SSD hardware failure or a connection issue.
   • Do not repeatedly power-cycle in the hope it will come back; this can worsen a failing SSD.
   • If the laptop is under warranty or serviceable, arrange professional service to:
     • Inspect the M.2 slot and SSD.
     • Replace the SSD if confirmed faulty.
   • If the device is a Surface or similar sealed device, use the official service options to send it in or get in-person support.
5. Data protection
   • If the SSD reappears even once, immediately back up any important data to external storage, as the failure may become permanent.

If the device is a Surface and shows a “couldn’t find a bootable operating system” message instead of the vendor-specific 2101 error, follow the documented Surface steps: verify boot configuration, try a forced restart, and if needed, reset using a USB recovery drive, then request service if the issue persists.

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References:

• Surface turns on and shows "Couldn't find a bootable operating system"
• “An operating system wasn’t found” error when booting Windows
• "Bootmgr is missing Press Ctrl+Alt+Del to restart" error when you start Windows
• What to do about a critical warning for a storage device