Username and Password Field in Windows:

 Steps:
1. Click on start button.
2. Click on run command.
3. Type "Regedit" then click on ok button.
4. Click on "Yes" button.
5. Then registry editor dialog box will appear.
6. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
7. Double click on "Do not display last username" option.
8. Set value data "1"
9. Click on ok button.
10. Again click on start button.
11. Click on run command.
12. Type "Gpedit.msc"
13. Windows setting > Security Setting > Local policies > Security option.
14. Double click on "Do not display last user name" option.
15. Click on "Enable" option.
16. Click on ok button.
17. Now restart your computer.