Current PIN code not working and cannot reset or login to system!!

Question

Hello Microsoft Support,

I am experiencing an urgent issue with my Windows system where I encounter an error related to a stack-based buffer overrun, specifically with explorer.exe. This error appears when I attempt to set up my PIN, rendering me unable to access my system normally. Additionally, when attempting to install necessary applications, I am prompted without success, indicating a deeper system problem.

I have tried accessing the system via Safe Mode and attempting a System Restore, but I am unable to successfully boot into or use these features due to the error. I am currently unable to perform any tasks or access my system settings effectively.

Could you please assist me in resolving this issue? I am looking for guidance on either stabilizing the existing system without losing personal files or understanding any recovery options available that can help me regain control of my system.

Thank you for your assistance.

Answer 1

Hello, Tal Nuni

Welcome to the Microsoft community.

Thank you for your feedback. Are you still able to log into the screen? From your description it looks like there is an issue with the system configuration file. If possible, you can try to upgrade in place or create a new local account.

1. Upgrade locally

Disclaimer: Let’s try performing an in-place install or in-place upgrade which will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up before making large system changes. If you want to back up your data first, please do so. Once you are done backing up, you can follow the steps in the following guides: 

How to run In-place upgrade in Windows 11 - Microsoft Community 

2. Create a new local account.

Select Start > Settings > Accounts, then Family and Other Users. Next to “Add another user”, select “Add account”. Select “I don't have this person's login information” and then on the next page select “Add a user without a Microsoft account”.

Enter a username, password, and password prompt, or select a security question, and then select Next.

Open Settings and create another account

Also change the local user account to an administrator account

Choose Start > Settings > Accounts.

Under Family and other users, select the name of the account owner (you should see “Local Account” below the name) and then select “Change Account Type”. Under “Account Type”, select “Administrator” and then select “OK”.

Create a local user or administrator account in Windows - Microsoft Support

I noticed that you can't use System Restore, can you send me an error message? Are you using the following method? (This method is applicable if you are unable to access the system)

Press and hold the power button to turn off the system, and turn it back on when it turns off. But instead of allowing booting, press and hold the power button But instead of allowing booting, press and hold the power button as soon as you see the boot logo on the screen.

Repeat this shutdown and start it until you see the Preparing automatic repair screen (it will take 3 or 4 attempts)

On the screen that appears, click on troubleshooting, then on advanced options, and then on system restore.

Choose a point in time before deleting files, and then restore them to that point in time.

Recovery options in Windows - Microsoft Support

I look forward to your feedback, which will help me pinpoint your problem.

Best Regards,

Aaron- MSFT | Microsoft Community Support Specialist