DISM does not show cleanup-image option. Unable to repair system image

Files were corrupted, so I tried using sfc to fix but it said it found files but couldn't repair them. So I tried "Dism /Online /Cleanup-Image /RestoreHealth" in cmd to fix the system image but it returned with "error 87" and "cleanup-image option is unknown". I then looked for available command for DISM using "dism /online /?" and I saw that there's no option for "cleanup-image". This command is available on my friend's laptop but not on mine. What can I do to fix this?
Windows version number: 21H1 OS Build 19043.1052

Paul Black said:

Hello @klodata,
Welcome to TenForums.




Are you talking about this? => How to Repair Windows 10 Image using DISM

I hope this helps.

No, it's not. I cannot repair windows 10 image because the my dism does not know how to execute the cleanup-image option.

Macboatmaster said:

Further to the above
this is the cmd
DISM /Online /Cleanup-image /Restorehealth

Are you runing it from a cmd prompt with admin rights
If so the cmd prompt window will be headed
Administrator - Command Prompt

If not it will be headed Command Prompt without thw word Administrator
To open an admin cmd prompt
type
cmd
in search bar when it appears above as Command Prompt - App
right click and click run as admin.

I am indeed trying all the commands on an elevated command prompt

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Macboatmaster said:

Further to the above are you using dism on the windows 10
I presume there is no chance you are trying dism on another Windows OS
Or indeed on a WinPE as against the installed 10 shown on your spec
https://docs.microsoft.com/en-us/win...rted-platforms

I have only Windows 10 which I intend to repair. I do not know how to repair windows 10 using windows pe. I am not sure whether I have windows pe