Windows 10 Pin Error

Try again later” error message, and you may even not be able to remove the current PIN from the Settings app. When you experience problems.

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Applies to

Windows 10

Windows Hello in Windows 10 enables users to sign in to their device using a PIN. How is a PIN different from (and better than) a password?On the surface, a PIN looks much like a password. A PIN can be a set of numbers, but enterprise policy might allow complex PINs that include special characters and letters, both upper-case and lower-case. Something like t758A! could be an account password or a complex Hello PIN. It isn't the structure of a PIN (length, complexity) that makes it better than a password, it's how it works.

Watch Dana Huang explain why a Windows Hello for Business PIN is more secure than a password.

PIN is tied to the device

One important difference between a password and a Hello PIN is that the PIN is tied to the specific device on which it was set up. That PIN is useless to anyone without that specific hardware. Someone who steals your password can sign in to your account from anywhere, but if they steal your PIN, they'd have to steal your physical device too!

Even you can't use that PIN anywhere except on that specific device. If you want to sign in on multiple devices, you have to set up Hello on each device.

PIN is local to the device

A password is transmitted to the server -- it can be intercepted in transmission or stolen from a server. A PIN is local to the device -- it isn't transmitted anywhere and it isn't stored on the server.When the PIN is created, it establishes a trusted relationship with the identity provider and creates an asymmetric key pair that is used for authentication. When you enter your PIN, it unlocks the authentication key and uses the key to sign the request that is sent to the authenticating server.

Note

For details on how Hello uses asymetric key pairs for authentication, see Windows Hello for Business.

PIN is backed by hardware

The Hello PIN is backed by a Trusted Platform Module (TPM) chip, which is a secure crypto-processor that is designed to carry out cryptographic operations. The chip includes multiple physical security mechanisms to make it tamper resistant, and malicious software is unable to tamper with the security functions of the TPM. All Windows 10 Mobile phones and many modern laptops have TPM.

User key material is generated and available within the Trusted Platform Module (TPM) of the user device, which protects it from attackers who want to capture the key material and reuse it. Because Hello uses asymmetric key pairs, users credentials can't be stolen in cases where the identity provider or websites the user accesses have been compromised.

The TPM protects against a variety of known and potential attacks, including PIN brute-force attacks. After too many incorrect guesses, the device is locked.

PIN can be complex

The Windows Hello for Business PIN is subject to the same set of IT management policies as a password, such as complexity, length, expiration, and history. Although we generally think of a PIN as a simple four-digit code, administrators can set policies for managed devices to require a PIN complexity similar to a password. You can require or block: special characters, uppercase characters, lowercase characters, and digits.

What if someone steals the laptop or phone?

To compromise a Windows Hello credential that TPM protects, an attacker must have access to the physical device, and then must find a way to spoof the user's biometrics or guess his or her PIN—and all of this must be done before TPM anti-hammering protection locks the device.You can provide additional protection for laptops that don't have TPM by enabling BitLocker and setting a policy to limit failed sign-ins.

Configure BitLocker without TPM

Use the Local Group Policy Editor (gpedit.msc) to enable the following policy:
Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Operating System Drives > Require additional authentication at startup
In the policy option, select Allow BitLocker without a compatible TPM, and then click OK.
Go to Control Panel > System and Security > BitLocker Drive Encryption and select the operating system drive to protect.Set account lockout threshold
Use the Local Group Policy Editor (gpedit.msc) to enable the following policy:
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Computer Configuration > Windows Settings > Security Settings > Account Policies > Account Lockout Policy > Account lockout threshold
Set the number of invalid logon attempts to allow, and then click OK.

Why do you need a PIN to use biometrics?

Windows Hello enables biometric sign-in for Windows 10: fingerprint, iris, or facial recognition. When you set up Windows Hello, you're asked to create a PIN first. This PIN enables you to sign in using the PIN when you can't use your preferred biometric because of an injury or because the sensor is unavailable or not working properly.

If you only had a biometric sign-in configured and, for any reason, were unable to use that method to sign in, you would have to sign in using your account and password, which doesn't provide you the same level of protection as Hello.

Fix: Windows Hello error 0x801c004d in Windows 10

To fix the Windows Hello error 0x801c004d in Windows 10, use the following workarounds –

1} Install the pending Windows 10 Updates

Among the possible reasons that cause Windows Hello error 0x801c004d, an outdated OS is the prime factor. Thus, before going to apply any further fixes, check whether your operating system is up to date or not. If yes, install the pending files using the below steps –

Open Local Settings using (Win and I) hotkey altogether.
Here, explore Update & Security category.
Move to the right hand side and tap over Check for Updates.

If any updates are available for your OS, download and install the same.
At last, Restart your PC to confirm the changes. The Windows Hello error 0x801c004d should work this way.

2} Re-create the PIN

If you continue to struggle with the Windows Hello error 0x801c004d while adding or using the existing PIN, it is better to create a new PIN. To reset PIN, use the steps –

Hold down the WIN logo and hit X key.
When the Power menu pops in, click Settings.
Succeeding this, Select Accounts category then Sign-in Options available at the left pane.
Switch to the right pane and select Password.
Click on the Add button and type the new password. Make sure to provide a hint as well.

Follow the on-screen instructions and hit Next to save the recent changes.

One may now use the latest PIN to sign in to your PC without receiving any issue.

3} Check the CNG Key Isolation Service status

The CNG Key Isolation services use the LSA process to safely secure the Windows Hello key inside PC. If this service stops accidentally, may lead to the Windows Hello error 0x801c004d. Hence, just check its startup type and set the same to Manual using the below steps –

Jointly press Win and R shortcut to launch the Run dialog.
At the Void, type services.msc then tap the OK button.
On the succeeding display screen, scroll down and locate the CNG Key Isolation.
When found, right-click on this and select the Properties option.

Under startup type select Manual using the drop-down menu.
Ensure its running status read Running otherwise check it and tap OK to save the changes.

Once over, Restart your system and check whether the issue resolves or not. If not, follow the next solutions –

4} Reset the Trusted Platform Module

As per certain user’s view, Windows Hello error 0x801c004d may vanish after resetting or clearing the TPM on Windows 10 device. To do so, follow the below procedure –

Press Win & X shortcut together to launch the Power Menu.
Here, click Windows PowerShell (Admin).
An UAC prompt will appear, press Yes to permit the access.
Next, type Clear-Tpm code near the blinking cursor and press Enter.

This command will automatically remove the Trusted Platform Module on your computer.

5} Create a New User Account

In case, the above workarounds fail to resolve the Windows Hello error 0x801c004d, create a new Admin account then try setting the PIN. Here’s how to proceed –

Right-click on the Windows icon and choose the Settings option.
Click Accounts thereafter Family & other users option.
Move to the right wing and hit Add someone else for this PC (under other users).

When Microsoft Account page pops up, enter valid Email ID and press the Next button.

Lastly, tap Finish in order to confirm the changes.

You may now easily set the PIN for the newly created Microsoft User Account without facing the error 0x801c004d.