I use the autologon swich in winnt.sif to unattended install of some apps:

[GuiUnattended]
    AdminPassword=1234
    EncryptedAdminPassword=No
    OemSkipWelcome=1
    AutoLogon=Yes
    AutoLogonCount=1

Then i use the autologon.reg to enable autologon from now...:

Windows Registry Editor Version 5.00 

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"DefaultUserName"="Administrator"
"DefaultPassword"="1234"
"AutoAdminLogon"="1"

but autologon is always not set after the 2nd reboot... does the winnt.sif overwrite the stettings i maked?

how can i solve this problem???

Remove AutoLogonCount

When the counter reaches 0, it will erase what is in the key.

yes, but when i remove the counter, i must login manual, when windows starts the first time......