Allowing a system to automatically log on when the machine is booted could give access to any unauthorized individual who restarts the computer. Automatic logon with administrator privileges would give full access to an unauthorized individual.
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> 'MSS- (AutoAdminLogon) Enable Automatic Logon (not recommended)' to 'Disabled'. Ensure no passwords are stored in the 'DefaultPassword' registry value noted below. Registry Hive- HKEY_LOCAL_MACHINE Subkey- \Software\Microsoft\Windows NT\CurrentVersion\Winlogon\ Value Name- DefaultPassword