This was already set:
For Windows XP Professional

* Click Start, Run and type Secpol.msc
* Under Local Policies, select Security Options
* In the right-pane, scroll down the list and locate the following entry:

Network access: Do not allow the storage of credentials or .NET
Passports for network authentication

* Double-click the option and set it to Disabled
* Close the Local Security Settings window
* Restart Windows for the changes to take effect

Here is the registry key that stores the above setting


[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Lsa]
"disabledomaincreds"=dword:00000000
HOWEVER:
the passwords are NOT saved.
Where else is this set and saved?