A1b2c3 Challenge Phrase Windows 10

[Brigitta Martini]

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Are you encountering the same issue as others: Windows 10/Windows 11 keeps asking for A1B2C3 on the login screen although you have entered the correct PIN? In this post on MiniTool, we will explore how to remove Windows A1B2C3 challenge phrase via some fixes.

When booting your PC to its login screen, you need to enter a PIN to sign in to the operating system. However, sometimes Windows 10/Windows 11 keeps asking for A1B2C3 challenge phrase. To be specific, on the computer screen, you see the error message:

This issue could happen although you type a correct PIN. The challenge phrase refers to a security measure to protect the system against brute-force attacks. If someone attempts to log into your account remotely, it is required to enter the challenge phrase.

While Windows 10/Windows 11 keeps asking for A1B2C3 on the login screen, you can enter A1B2C3 and then the PIN/biometric information. Alternatively, click Sign-in options to choose another option for Windows login if you ever configured other methods like a password.

Windows stores your login information in the Ngc folder. Due to some reason, this folder could go wrong and get damaged. Needless to say, some login errors happen. If Windows keeps asking to enter A1B2C3, try to delete the Ngc folder via the steps below.

To troubleshoot the A1B2C3 challenge phrase problem, the first step is to sign in to your Windows computer. If you have set up a PIN as your sign-in method, you also have a password option. Windows does not allow setting up a PIN without a password.

Windows stores your login information in the NGC folder. If this folder is corrupt, contains files with bugs, or lacks correct permissions, you may encounter sign-in errors like the A1B2C3 challenge phrase error. To fix this issue:

While encountering the A1B2C3 challenge phrase may be frustrating, we do not recommend removing your password or PIN completely. This leaves your computer vulnerable to unauthorized access. Instead, set up multiple sign-in methods like password, PIN, fingerprint, or face unlock. This way, if one method fails, you have backups in place to ensure the security and privacy of your Windows 10/11 computer.

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Try to look into creating a clean install from a new boot drive. If you need to recover data you can try to get it through a live boot enviorment!

Your challenge phrase might be shared with your Microsoft account, so if you remember that one give it a try!

Windows PC has a Challenge Phrase security feature to reduce brute-force login attempts. What it does is display the A1B2C3 error and asks the user to enter the challenge phrase which is literally A1B2C3. Here is the error message:

Windows saves your login information in the NGC folder. Needless to say, if the folder is corrupt, has files with bugs, or lacks correct permissions, you will face sign-in errors like challenge phrase A1B2C3 error.

If your Windows computer has a webcam and/or fingerprint reader, we recommend you set it up. That would make it so much easier to sign in to your Windows computer. No need to remember and enter a PIN or password now.

Gaurav is an editor here at TechWiser but also contributes as a writer. He has more than 10 years of experience as a writer and has written how-to guides, comparisons, listicles, and in-depth explainers on Windows, Android, web, and cloud apps, and the Apple ecosystem. He loves tinkering with new gadgets and learning about new happenings in the tech world. He has previously worked on Guiding Tech, Make Tech Easier, and other prominent tech blogs and has over 1000+ articles that have been read over 50 million times.

Several of our readers have been reporting that they need to enter A1B2C3 despite entering the correct pin each time they restart their Windows 11 PC. This weird problem mentions that you have entered the incorrect pin several times, and to try again, you need to enter A1B2C3 in the text box.

In case, a glitch with your old PIN or deletion of the sign-in info is causing the a1b2c3 challenge phrase issue in Windows 11, changing the login PIN for the account you use to log into your PC will help you resolve it.

After several unsuccessful login attempts in Windows 11, the operating system will trigger a challenge phrase. It is designed to make unapproved entry harder on your computer. However, you may want to disable the Windows 11 challenge phrase.

This may be because it is triggered randomly and makes login unnecessarily more complicated or because you get the A1B2C3 challenge phrase every time you boot your computer. Let us show you the best ways to disable it.

Your Access Control List is a digital bouncer for your files and folders. It controls who accesses files and their permissions or rights while using them. You may reset it to disable the challenge phrase in Windows 11.

My father's managed to stuff up his Windows 11 laptop by entering the wrong password too many times. Googling around, it seems he's not the only one. It's now insisting on a challenge phrase "A1B2C3" on every boot. That's fine, he can get past that. But then it asks for his "PIN". (Strange, but it's always asked for his alphanumeric password as a "PIN". In reality I'm sure this his laptop password, not a Windows Hello PIN as he's never set the latter up.)

Even though we're sure he's now got the right password, he then gets an error: "This sign in option is disabled because of failed sign-in attempts or repeated shutdowns. Use a different sign-in option or keep your device powered on for at least 2 hours and then try again."

Sadly, he's not got any other sign-in options available. So waiting seems the obvious option. But having waited two hours then 24 hour to be sure, we've seen no change. It's pretty borked. The initial cause might have been a duff password, but something is seriously wrong with the timeout reset.

There's no admin account set up on the machine, and despite attempts to create one from the recovery console, I'm not in the right context to use net user on the host system. Attempts to get to a command prompt in the right context from Safe Mode fail as that also hits the account lockout.

At this point I was hoping to clear the timeout or reset the password, but neither seems easy as the Home edition doesn't support the fully-fledged Local Users and Groups Computer Management snap-in, which would presumably show suitable properties for the account. net user doesn't seem to offer much helpful either.

Let us now continue to see how we can bypass or mitigate the problem once and for all.Bypass/Fix Continuous A1B2C3 Challenge PhraseThere are methods to both bypass the A1B2C3 challenge phrase in case it was a one-time prompt or fix the issue if you are encountering the prompt continuously and repeatedly.We suggest that you perform the given solutions below in the given chronological order that go from simply bypassing the challenge phrase to resolving the repeated prompt. Additionally, perform all the methods using an administrator account.

In case there is any issue with the information stored on the computer regarding your PIN, you ought to try deleting the old PIN and creating a new one. This way, the locally stored data will be reset and new files will be created.Here are the steps to create a new PIN in Windows:Go to the following:

Click Ok on the advanced security setting and properties window.Now that you have the required permissions (since you are logged in from an administrative account), continue to perform the steps in the next section to reset the ACL.Reset ACLFollow these steps to reset the ACL and check whether it resolves the issue:Open an elevated Command Prompt.

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Hi, this is quite an annoyance, when I boot my system (wind10) I see characters being automatically inserted where the pin goes and then I receive the message that I need to type in a challenge phrase i.e. 'A1B2C3'.

The strange thing is that I have two clones of my operating system and have tried to boot with those also, but have the same problem. Is this a BIOS issue? I have no idea how changes in info could affect a cloned copy that worked without the problem before this started on my main drive.

Hi, and thanks for the reply. I had a quick look at the page you left the link for and was going to go back to it. I I had tried deleting the NGC folder, but I couldn't, though there was nothing in it.

So I've been using my tablet a lot and forgot my password into my laptop. It gives me a challenge phrase A1B2C3. But when I put that in it was saying incorrect. Just now I got it to take that only for it to request a PIN. Again nothing I come up with is it

Probably the best option is going to be a System Recovery which will restore the machine back to factory settings and you start over. You do this by tapping away on the F11 key immediately after powering on. The link below gives detailed instructions.

If you have a lot of passwords for many accounts, I sincerely recommend that you keep all your passwords in the same place and hide them. This way you will not fall into the same dilemma again. Going back to the problem, installing the closing disk is the most common method. Have you tried it? Furthermore, you can use HP Recovery Manager and another administrator account to reset forgotten password on HP Laptop without Disk. Finally, you can unlock the tool with a password that is not at risk of losing data, like Password Genius.

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