Windows 10 Microsoft Account replaced the local account

I've created a dummy email account for outlook but little did I know the microsoft email links to the Windows 10.Now I cannot reset my password + I don't know the password and I'm locket out of Windows 10. I've installed Windows 7 and I can access the win10 files.Is there a way I can fix this?
Thanks in advance

Hi Winexe,

If you don’t know the password you assigned to it, that Microsoft Account will forever hold your local account locked.

Luckily, your dual boot setup can save you here. You might not be able to login to your account again but you can recover your files and settings easily enough by activating the builtin Administrator account on the Windows 10 portion and using that account to access your files and delete the secured Microsoft Account.

1. Boot into Windows 7.
2. Locate and delete “\Windows\System32\sethc.exe” on the Windows 10 file system.
3. Make a copy of “\Windows\System32\cmd.exe“ (on the Windows 10 file system) and rename it to “sethc.exe”.
4. Boot into Windows 10.
5. On the user logon screen, press the shift key 5 times in succession. A Command Prompt should open on the logon screen.
6. Enter net user Administrator /active into this Command Prompt.
7. Reboot and at the login screen the Administrator account will become available.

You can now use this Administrator account to recover your files under “C:\Users”.

@Brink i've tried with metod 2 but the only user there is my windows 7 account
@Pyprohly i've tried to delete the file but it won't let me even with ownership and full control to it.When i try to delete it i get the following