This is the one I know of if your running Windows XP
1. In Start menu select Run
2. Enter: "control userpasswords2"
3. Go to Advanced tab
4. Select Manage Passwords Button
5. Add or Remove items at will.
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And I've just learned this way in the last 48 hours, thanks to Jonathan Kay
"You can remove Passports in the sign in list by clicking the Start Button, then
click the Control Panel. Then, click User Accounts in the Control Panel. Select your
account name, and then on the left side of the screen, under Related Tasks, click
'Manage my Network Passwords'. In the window that opens, you can remove accounts by
clicking the passport you wish to delete [denoted by (Passport)], and then click the
'Remove' button."
Have a great day
Silvertabby