Login To Windows Automatically
DO NOT use this on an internet accessible server because the account name and password are stored in plain text in the registery.
It is an obvious security failing to setup a machine to do this, but in certain restricted circumstances is allowable if the machine is on a private network and is being used for automatic tests which entail rebooting the computer from time to time.
As follows, works for Windows XP Professional (and most likely other versions):
My Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Add or enter values for !DefaultDomainName, !DefaultPassword, & !DefaultUsername
Reboot to test operation.