1. A computer-implemented method for secure access to computer resources on a computing system having an operating system with a default graphical identification and authentication (GINA) module and a Winlogon application including steps of: providing a local computing graphical identification and authentication (GINA) module compatible with the default operating system GINA module, where the computing GINA module is a multiple user desktop (MUD) GINA module; substituting the MUD GINA for the default operating system GINA; using the MUD GINA to provide secure access to the computer resources on the local computing module for one or more users, wherein each of the one or more users has a unique credential; logging on a system dummy-user with the Winlogon application; using the system dummy-user to maintain a logged-on state with the Winlogon application on the local computing module when at least one of the one or more users is logged-on with the unique credential specific to the at least one user; providing MUD GINA functionality for secure access to the computer resources, including intermittent logon and logoff by each of the one or more users; and using the MUD GINA functionality to logon and logoff the at least one of the one or more users while the system dummy-user logged-on state is maintained with the Winlogon application.