Users who have been hidden from the login screen are no longer able to log in.

I am very troubled that I cannot log in as an administrator.
Could someone give me some advice on how to solve this problem?

Background

Lost security settings were configured in accordance with ESET-anti-cept.
There are two user accounts.

メイン Main administrator permission account (with password)
②Lost Account (No Password)

*ESET - Anti-cept is a function that sends location information, screenshots, and built-in camera information when the person who finds it logs in to に.

I finished setting it up and used it normally, but
*When I start the PC, a photo is displayed, and when I press Enter, the password input box of の is displayed. (The user name input box is not displayed.)

The accounts of , and の will be displayed in the lower left corner of the login screen at startup.
①Feeling uncomfortable displaying the administrator account username in , I executed the hidden command referring to the following article:

How to keep certain users from appearing on the Windows 10 sign-in screen

regadd"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList"/v Username/tREG_DWORD/d0/f

I thought it was only displayed in だけの, so I restarted it, and now I'm automatically logged in to に.

I realized that I couldn't log in to へ from here, and it's the beginning of trial and error.

What I did

What do you want to do

I would like to log in with the account of の

I used it every day, so I remember the username and password.
As long as I can see the user name and password box, I can log in.

Thank you for your advice.

environment:
Laptops LG-gram15Z980-GA55J
Edition Windows 10 Home Version 20H2 OS Build 19042.867 Experience Windows Feature Experience Pack 120.2212.551.0