[Clear username drop down list]

Do you see the same usernames if you run "control.exe keymgr.dll" on the box? If so, delete them from keymgr.dll and they should be gone (cached credential list).

Never heard of this suggestion, but I have a feeling that yours might be correct. I have to test it out once I get back from my vacation.

[Clear username drop down list]

AO3 and Stoic Joker, No offense, but your suggestions are incorrect since Microsoft Passport is not tied to IE, therefore clearing out saved usernames/passwords from IE will not clear out those from Microsoft Passport.

cyberguest, I strongly advise you to follow my method as this is the only correct way to do this.

Method #1:

You will need to modify/create a key within the system. Open the Registry Editor, and navigate to the key:

HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Control\ Lsa

Create a Value called "disabledomaincreds" and set it to "1". Reboot will finalise the process.

Note: This is generally only useful if you are setting up a system to be used by many users.

Key Details:

Machine Key: [HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Control\ Lsa]

Value Name: disabledomaincreds

Data Type: REG_DWORD (DWORD Value)

Data Value: "1" = disable : "0" = enable

Method #2

Here's a faster, safe, alternate way: must be logged in as ADMIN

Go to Start + Control Panel + User Accounts + Choose your account + "Manage my network passwords" at the top left + Then delete whichever MSN accounts you don't need.