My drives have swapped. Boot Drive C is now D, and vice versa

Hi

Welcome to Microsoft community.

I'm glad to help you.

You cannot start the system at this time because your system drive letter has changed. The only way is to enter re mode and use the command to modify the drive letter.

First enter re mode. Please use the power button to restart the computer three times. This starts the Windows Recovery Environment.

Open the command prompt.

Type diskpart in the command prompt enter diskpart.exe

DISKPART> list disk

List disk can query the current computer disk.

DISKPART> select disk X

X represents the number of drive letters in your list, such as disk0 disk1. Select the drive letter of your current C drive.

DISKPART>Select partition X

Select the partition to modify the drive letter.

DISKPART>list partition

List partition can query the existing partitions of the current disk.

DISKPART>Select partition X

Select the partition to modify the drive letter. X represents the number of partition in your list.

DISKPART>assign letter X:

The X here represents other letters except C and D, and you can choose any one you want.

At this time, your current C drive has changed the drive letter to another letter. (not c and d)

In the same procedure, change the current drive D to drive letter C.

After all is completed, restart your computer and check whether you can start Windows normally.

If you need more help, please don't hesitate to let me know.

Best regards

Derrick Qian | Microsoft Community Support Specialist

Indicate the make and model of the computer.

Please do not attempt to change the drive letters.

The change in drive letters is not abnormal and is relatively common when there is failure to boot.

Find a flash drive that you can format ( > or = 8 GB)

On a working computer create a bootable Windows 11 Media Creation Tool (MCT) (Windows 11 iso).

https://www.elevenforum.com/t/create-windows-11-bootable-usb-installation-media.750/

https://www.elevenforum.com/t/download-official-windows-11-iso-file-from-microsoft.1009/ https://www.microsoft.com/software-download/windows11

Boot to the Windows MCT: http://www.disk-image.com/faq-bootmenu.htm

Type these commands and post images or share links displaying the commands with results into this thread

bcdedit /enum all

bcdedit | find"osdevice"

diskpart

lis dis

lis vol

sel dis 0

det dis

lis par

sel par 1

det par

sel par 2

det par

sel par 3

det par

sel par 4

det par

sel par 5

det par

sel par 6

det par

sel dis 1

det dis

lis par

sel par 1

det par

sel par 2

det par

sel par 3

det par

sel par 4

det par

sel par 5

det par

sel par 6

det par

Then what did you actually do to cause this?

Is D:\ a physical internal drive?