Start Registry Editor (Regedt32.exe), and go to the following subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT
\CurrentVersion\Winlogon
NOTE: The above registry key is one path; it has been wrapped for readability.
Add the following values to Winlogon: AutoAdminLogon: REG_SZ: 1
DefaultUserName: REG_SZ:
DefaultPassword: REG_SZ:
DefaultDomainName: REG:SZ:
DontDisplayLastUserName: REG_SZ: 0
Add the folowing value:
ForceAutoLogon = 1