Might be a security hole because this allows for a Win2000 style log-in. XP doesn't allow for NULL passwords normally...but apparently using this method you can use NULL passwords?!?!?
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On a Windows XP Professional-based computer that is a member of a workgroup, you have the option of using the friendly logon interface as opposed to the classic Windows logon interface. If you add a second user that has administrative privileges, the built-in Administrator account does not appear during the friendly logon method.
RESOLUTION
To resolve this problem so that you can access the original Administrator account:
Press the CTRL+ALT+DELETE key combination twice during the friendly logon interface to use the conventional Windows 2000 logon interface.
Restart the computer in Safe mode, or log on remotely by using Remote Desktop and the Autologon feature of the Remote Desktop Client.
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"A RONSTER!"
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On a Windows XP Professional-based computer that is a member of a workgroup, you have the option of using the friendly logon interface as opposed to the classic Windows logon interface. If you add a second user that has administrative privileges, the built-in Administrator account does not appear during the friendly logon method.
RESOLUTION
To resolve this problem so that you can access the original Administrator account:
Press the CTRL+ALT+DELETE key combination twice during the friendly logon interface to use the conventional Windows 2000 logon interface.
Restart the computer in Safe mode, or log on remotely by using Remote Desktop and the Autologon feature of the Remote Desktop Client.
======================
"A RONSTER!"