Yes, access is possible, but not in the exact way described.
Key points from the scenario:
- The PC is standalone (not domain-joined).
- The only user is a local account whose password may be unknown.
- There is currently no separate local administrator account configured for IT.
From the provided information, the supported and documented options are:
- Use another existing administrator account (if any) to reset the local password
If there is any other local administrator account on the PC that can still sign in, that account can reset the top management user’s password:- Sign in with the working administrator account.
- Open Computer Management.
- Expand Local Users and Groups > Users.
- Right-click the target user account and select Set Password….
- Enter and confirm a new password. This allows access to the user profile and installed applications under that account.
- Enable the built-in Administrator account (if you can sign in or use Safe Mode)
If the built-in Administrator account exists but is disabled, and there is some way to sign in (for example, Safe Mode still allows Administrator logon even when disabled), it can be re-enabled and then used to reset the user’s password: a. Log on in Safe Mode as Administrator (when the local Administrator account is disabled):- Restart the computer and press F8 after POST to open Windows Advanced Options.
- Select Safe Mode and press Enter.
- Select the OS and log on as Administrator.
- After Safe Mode loads, open Computer Management.
- Expand Local Users and Groups > Users.
- Right-click Administrator > Properties.
- Clear Account is disabled and click OK.
but for a standalone client, the GUI method above is the documented approach when you can get into Safe Mode.net user administrator /active:yes - If no administrator access is available at all
If:- There is no other local administrator account that can sign in,
- Safe Mode does not allow logon as Administrator,
- And there is no way to authenticate as an administrator,
Regarding the specific idea of:
- Booting from a Windows 11 USB,
- Opening Command Prompt in Windows RE,
- Enabling the built-in Administrator and resetting the user password from there:
The provided documentation does not describe or endorse enabling the built-in Administrator or resetting local user passwords directly from Windows Recovery Environment/USB boot using offline registry or similar techniques. The supported methods shown are:
- Using Safe Mode to log on as Administrator even when disabled, then re-enabling it.
- Using an existing administrator account in normal mode to reset another local account’s password.
- Resetting the device if no admin account is available.
If access to the application and data is required, ensure that at least one local administrator account can sign in (via Safe Mode if necessary), then use that account to reset the user’s password.
References: