You may remove PIN:
Please follow the procedure below to remove it.
- Press Windows+I to open the Configure window;
- Select the option Accounts;
- Select in the left column the option "Input Options";
- In the window on the right, scroll down to the option "Require Windows Hello Sign In for Microsoft Accounts" and set the button to "Disabled";
- Go up to the option "Windows Hello PIN", click "Remove", and confirm once more;
- Enter your Microsoft account password in the next window and confirm.
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Select the "Remember Password" check box to stop the pop-ups from appearing.