Create a temporary, disposable Microsoft Account (e.g., tempuser@outlook.com ), switch out of S Mode (one-time, irreversible, free), then remove the account from the device. After switching, you can delete the MSA and continue using a local account permanently. This is the only safe, supported method.

Feasibility of Exiting Windows 10/11 S Mode Without a Microsoft Account

Restart your PC and enter the (usually by tapping F2, F12, or Del during boot).

When the prompt appears asking you to sign in, look for a small link or option that says or simply close the sign-in pop-up.

Standard procedure explicitly rejects local accounts.