deleting stored passwords by the /savcred option

> Hello NG,
>
> I stored the Administrator password
> with the /savecred option as a normal
> basic user to open a program with
> Administrator privileges.
>
> 1. Where and how is this password stored?
>
> 2. How can I delete those passwords?
>
> btw: I don't mean the mechanism/dialogs
> which are described at
>
> http://support.microsoft.com/kb/287536 and
> http://support.microsoft.com/kb/281660/EN-US/
>
> this describes to store the passwords for
> othr computer/domains - Typically use "net use..."
> or smarcards or Webaccounts, etc.
>
> If I click Start, run and type "Control Userpasswords2",
> and then press ENTER. The dialog in Manage Passwords don't
> show me the passords which I stored with
>
> Example:
>
> runas.exe /noprofile /user:MYCOMPUTER\Administrator
> /savecred "C:\Program Files\WinRAR\winrar.exe"
>
> Thanks in Advance
>
> S