Can't sign in with a Microsoft account: Eror 0x800704ec

Hi

Welcome to Microsoft community.

Have you tried to re-register the store app to check?

• Open the Start Menu, type PowerShell, right-click the top result and select Run as Administrator. Accept the UAC confirmation prompt when it appears.
  
• Next, paste the following in the PowerShell window and hit the Enter key:
  

Get-AppXPackage -Name Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml” -Verbose}

• Once the task is completed, reboot the system.
  

At the same time, I found the following two similar threads in the forum for you to refer to.

Windows Defender: This app is turned off by group policy - Microsoft Community

Windows defender is stopped by group policy - Microsoft Community

Keep us posted if you encounter any challenges along the process.

Best regards

Derrick Qian | Microsoft Community Support Specialist

Hello, thanks for entering in contact here on our community

My name is João, I'm a Xbox gamer just like you and I will be glad to help you in your matter today!

I'm sorry you are having problems to log in to your account after you changed to Windows 11.

Please try this troubleshooting:

On the Desktop, press the Windows + R keys, type msconfig and click OK;

In the System Configuration window, click on the Services tab;

At the bottom of the screen, check the Hide all Microsoft services box and click Disable all;

Now click on the Program Startup tab and Open Task Manager;

When loading the task manager, click on the Startup tab and disable all non-Microsoft programs (right-click on the program and choose disable), Close the Task Manager and click Apply and OK;

Restart the computer.

Note: This procedure disables all third-party services and programs. You can later, if the problem is solved in this way, enable the programs and services that will start with Windows, selectively, instead of keeping them all disabled. If the problem returns after activating the initialization of a specific service or program, the problem is precisely with the initialization of this software and it is recommended to remove it.

Hello!

My name is Dérek, I'm an independent platform consultant and I'm grateful for the opportunity to help you.

Ahmet, let's try some different methods

Try to buy the item directly from the website, not from the Store.

If you get an error, change your payment method

https://support.microsoft.com/en-us/help/402659...

I remain at your disposal if you have any further questions.

Eror login for what? Help!

Hi there!

Since it's part of your account security measures, no one has the ability to change or manipulate your account verification process. The system automatically does that based on the security information you have setup on your account.

On the verification process, make sure that you correcly entered the full email address where the code is supposed to be sent. If you provided an incorrect email address that didn't match with the email address registered on your account, it won't work. Please try to double check the details.