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Updated on May 20, 2025
johnjacobb40
Participant
May 20, 2025 at 9:09 am
Q:

How do I fix “The requested system device cannot be found” error?

Hi,
I’m trying to fix my Windows PC, and I keep getting this error:
“The requested system device cannot be found.”

It shows up when I run some commands like bcdboot or bootrec in Command Prompt. This started after I changed some partitions while reinstalling Windows.

I can still see my hard drive in Disk Management, but I’m not sure what’s wrong.

Can someone please explain what this means and how to fix it in simple steps?

Thanks!

Tagged: 
Windows data recovery

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Viewing 3 replies - 1 through 3 (of 3 total)

Mira Lennox Lennox
Participant
May 30, 2025 at 6:06 am

These steps are generally safe and do not cause data loss because they only repair boot files, not personal data. Commands like bootrec, bcdboot, and assigning a drive letter to the EFI partition are low-risk when used correctly.

However, mistakes like selecting the wrong partition, using the wrong drive letter, or accidentally formatting a partition can lead to problems.

To stay safe, it’s a good idea to back up any important files beforehand and double-check partition details in diskpart before running any commands.

johnjacobb40
Participant
May 28, 2025 at 12:05 pm

Could these steps cause data loss, or is it safe to proceed without backing up the system first?

Mira Lennox Lennox
Participant
May 20, 2025 at 11:34 am

Hi,

This error means Windows can’t find the boot partition after changes to your system. To fix it, boot from a Windows USB or DVD and open Command Prompt. Run these commands one by one:

bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd

If that doesn’t help, use these steps to assign a letter to the EFI partition:

Type diskpart

Type list volume and find the small FAT32 partition (EFI)

Type select volume # (replace # with the EFI number)

Type assign letter=Z

Type exit

Then run:
bootrec /fixboot
ren BCD BCD.bak
bcdboot C:\Windows /s Z: /f ALL

Then, Restart your PC. I am also attaching the blog link for your reference.

How to Fix the “Requested System Device Cannot Be Found” Error?

Viewing 3 replies - 1 through 3 (of 3 total)

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