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If you have recently upgraded your Windows computer to Windows 10 Fall Creators Update (v1709) or installed a Windows Update and you have a problem where the login screen appears twice, you can solve the problem using these two solutions.
The login screen appears twice in Windows 10
1]. If you have an older version of Windows and have recently installed an update for Windows 10 v1709, your system automatically uses the credentials to prepare the device for the new update. This is the main reason why you will see the login screen again after entering your access data.
You can disable this function in the Windows settings. Go to Accounts > Login Options. On the right side, you will find a Privacy category. By default, the Use my credentials option is enabled to automatically exit my device settings after an update or restart.
You must turn the button Off to disable this function. After that, you should not find the same problem on your machine.
2] Although the above solution works in various cases, you can also use this trick to do so. Open the user account settings. Press Win + R, enter netplwiz and press Enter. You will find an option named Users must enter a user name and password to use this computer . By default, this option is enabled. You must clear the check box.
You must now enter the user name and password and restart your computer. After restarting your PC, open the same dialog box and reactivate the same feature.
In simple terms, you have enabled and disabled the automatic login.
I hope these suggestions will help you.
Advanced Literature: The Windows login screen appears twice when you resume the computer from sleep mode