Get Rid of the Logon Screen
 

Windows Vista & 7

Start & run "netplwiz"

Users Must Enter a User Name and Password to Use This Computer” Checkbox Missing in Windows 10

open Registry Editor and go to following key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PasswordLess\Device
look for DevicePasswordLessBuildVersion DWORD.
The value of this DWORD would be set to 2 in your device. change its value to 0

read the entire document here
https://www.askvg.com/fix-users-must-enter-a-user-name-and-password-to-use-this-computer-checkbox-missing-in-windows-10/

Whether or not you're on a local area network, odds are you don't really need the little logon (login) screen asking for your username and password that comes up when starting Windows. To remove this prompt, follow the following directions:

Windows XP - solution 1:

• Select Run from the Start Menu, type control userpasswords2, and click Ok.

• Turn off the Users must enter a user name and password to use this computer option, and click Ok.

Windows XP - solution 2:

• If you have one user account and no password configured, Windows XP will log you in automatically. Otherwise, you'll have to do the following:

   

• Obtain and install the Windows XP version of TweakUI.

• Open TweakUI (it's in Start -> Programs -> Powertoys for Windows XP).

• Expand the Logon branch, and click Autologon.

• Turn on the Log on automatically at system startup option, type your username and password, and click Ok.

Windows 2000 - solution 1:

• Double-click the Users icon in Control Panel, and choose the Users tab.

• Turn off the Users must enter a user name and password to use this computer option, and click Ok.

Windows 2000 - solution 2:

• Double-click the System icon in Control Panel, and choose the Network Identification tab.

• Click Network ID and follow the instructions on screen.

Windows 95/98/Me (If you don't have multiple users configured):

• Open Control Panel, and double-click on the Network icon.

• From the list entitled Primary Network Logon:, choose Windows Logon, and press OK.

   

• Note: If this doesn't work, make sure you didn't initially configure a password for yourself. If you did, Windows 98 will always require it. Double-click on the Passwords icon in Control Panel to choose nothing (leave it blank) for your password.

Windows 95/98/Me (If you do have multiple users configured):

• Run the Registry Editor (REGEDIT.EXE).

• Open HKEY_LOCAL_MACHINE\ Network\ Logon.

• Double-click on the Process Logon Script value, and change the data from 00 00 00 00 to 00 00 00 01

Windows 95/98/Me (If nothing else works):

• Install Tweak UI, and double-click the Tweak UI icon in Control Panel.

• Choose the Network tab, and check the Log on automatically at system startup option.

• Type your username (shown after Log Off in your Start Menu) and your password (leave it blank if you don't have one), and click Ok when you're done.