Remove the .NET Credentials (Stored User names and Passwords)
To remove the Stored User Names and Passwords from your system, try this:
- Click Start, Run and type Control keymgr.dll
- Remove the entries from the list.
The other ways to access this dialog are:
Type Control Userpasswords2 in RUN box, click Advanced, Manage Passwords
From Control Panel, select your User Account, click Manage your network passwords