The "This sign-in option is disabled" message usually appears due to several reasons such as failed login attempts, repeated shutdowns, system update bugs, or security policies like account lockout. When this happens, Windows disables the sign-in method (commonly the PIN) to prevent further unauthorized access. Common solutions include:
- Using a different sign-in method such as a password or fingerprint.
- Keeping the device powered on for about 2 hours without shutting down and then trying again.
- Resetting the PIN or password.
- Modifying account lockout policies via Group Policy Editor (Windows Pro) or Registry Editor (Windows Home).
- Updating device drivers and Windows system to resolve any bugs or conflicts.
If the device is repeatedly shutting down or there are too many failed attempts, Windows temporarily disables the sign-in option to protect the system. Waiting with the device powered on allows the lockout timer to expire. In summary, the disabled sign-in option is typically a security feature triggered by multiple failed attempts or improper shutdowns, and can be resolved by using alternative sign-in options, waiting, or adjusting account policies.