Preventing the Password Prompt in a Non-Domain System
1. In Control Panel, double-click Users and Passwords.
2. Click to clear the Users must enter a user name and password to use this computer check box.

NOTE: This option does not appear on a system that is a member of a domain.
3. Click the Advanced tab.
4. Click to clear the Require users to press Ctrl-Alt-Del before logging on check box.
Automatic logon is not supported when you are logging on to a domain. You will need to join a workgroup if you want to use the automatic logon feature.

http://support.microsoft.com/default.aspx?scid=kb;EN-US;q234562

Nije podrzano malo sutra. Postoji nacin cak i ako je racunar prikljucen domenu ali je malko nezgodan (sa security stanovista).
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Pa tu:
DefaultDomainName = [ime domena]
DefaultPassword = [password]
DefaultUserName = [username]

Svi su REG_SZ i potrebno je zameniti odogvarajucim vrednostima (zagrade [ i ] se ne pisu).

Mozda bi trebalo poduciti MS kako radi Windows ;).

rundll32.exe %SystemRoot%\System32\netplwiz.dll,UsersRunDll

Users must enter a username and Password to enter computer