Cannot Map a Network Drive Under Different User Credentials

If you use the Map Network Drive Wizard to connect to a network share by using
different user credentials and you use the browse functionality to locate the network
share, you may receive the following error message:
The network folder specified is currently mapped using a different user name and
password. To connect using a different user name and password, first disconnect any
existing mappings to this network share.
You receive this error message even though you are not aware of making a different
connection.