BIOS update now locked out

A BIOS update can trigger a Windows Hello PIN reset because TPM-related data may change. Start with the sign-in method that matches the account on the PC:

1. On the Windows sign-in screen, select Sign-in options.
   • If a PIN was used before, look for I forgot my PIN.
   • If the device uses a Microsoft account password, look for I forgot my password.
2. If the PC signs in with a Microsoft account:
   • At the sign-in screen, select I forgot my password.
   • Or select Sign-in options > Web sign-in, then sign in and choose Forgot my password.
   • From another device or browser, the password can also be reset here: Reset password.
3. If the Microsoft password was already changed but sign-in still fails:
   • Use the Sign-in Helper: Sign-in Helper
   • Avoid repeated sign-in attempts, because too many failed attempts can temporarily lock the account.
   • If the account was temporarily locked, wait at least 24 hours before trying again.
4. If the device uses a local Windows account instead of a Microsoft account:
   • On the sign-in screen, select the arrow next to the password box.
   • Select OK > Reset password.
   • Answer the security questions for that local account.
5. If Windows is showing the wrong profile after the BIOS update:
   • Restart and enter BIOS/UEFI.
   • Verify the correct system drive is first in the boot order.
   • Save changes and restart.
6. If none of the reset options work:
   • Use Contact Support from Microsoft support.
   • Microsoft support cannot retrieve or bypass a lost password, and support agents cannot send password reset links or change account details.

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