How do I reset cached passwords?

Assume you use windows 2000.

Use Windows Explorer => Tools => Map Network Drive => Disconnect Network Drive

There you will see a list of resources which you can remove connection from.

Then you can reconnect the servers using different username/password.

Try

C:\> net use

to view your opened connections.

--------------------------------------------------------
C:\Documents and Settings\Administrator>net use
New connections will be remembered.

Status Local Remote Network

-------------------------------------------------------------------------------
OK \\some_pc\IPC$ Microsoft Windows Network
OK Z: \\some_pc2\c$ Microsoft Windows Network
The command completed successfully.
--------------------------------------------------------

Then you can delete all these connections including mapped drives and networked resources.

Try C:> net use /? for more details.

Hope these helps and let me know the result. Thanks.

PS: It happens to me sometimes that the cache could never be removed even if all the resources are removed. Most cases new username password will be asked. Please note that by default it uses the currently loggon user name and password. You can also specify it manually using net use command.