Won't accept PASSCODE?

Enter the password for a Windows administrator account—the prompt is from Windows User Account Control (UAC), not from the Brother HL-L2405W, so the printer’s passcode and a Windows Hello PIN will not satisfy it.

What to enter

1. Check the account name or email displayed in the UAC window.
2. Enter the password for that Windows administrator account.
   • If it displays an email address, use that Microsoft account’s password.
   • If it displays a local username, use that local Windows account’s password.
3. If More choices appears, select it and choose a different administrator account.

A standard Windows user receives a credential prompt when an operation needs administrative access; Windows requires a valid administrator username and password to continue.^1^

If the password is forgotten

• Microsoft account: Reset its password using Forgotten your password?, verify the account with a security code, and create a new password.^2^
• Local Windows account: At the Windows sign-in screen, select the arrow beside the password field, then OK → Reset password, and answer the account’s security questions.^3^

After resetting it, sign out or restart Windows, sign in with the new password once, and then run Windows Update again.

If the PC belongs to your brother or his account is the only administrator, he must enter or recover that Windows administrator password. A printer password cannot grant Windows administrator permission, and the password should not be bypassed.

References

1. How User Account Control works
2. Reset a forgotten Microsoft account password
3. Change or reset your Microsoft account password in Windows