试试下面的:
REGI HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoAdminLogon=1
REGI HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\DefaultUserName=LsaSetupDomain\Administrator
REGI HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\DefaultPassword=""