Windows 7 Welcome Screen doesn't display user account

1. Press WinKey+R > type secpol.msc and press enter
2. Navigate to Local policies -> Security options
3. Find the entry "Interactive Logon: Do not display last user name" and make sure it is disabled.

Using the Control Panel

Go to Control Panel > User Accounts.
Click "Change the way users log on or off."
Uncheck "Use the Welcome Screen" and click OK.
You will notice the change as soon as you close your session.

To reactivate the modern login screen, select "Use the Welcome screen."

Through the registry

For this, a modification of the registry is necessary. It is recommended to save it.
Go to Start> Run.
Type regedit and click OK.
Locate the key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Double click on the DWORD value LogonType and change its value to 0 to disable the Welcome screen or to 1 to reactivate it.