Abstract: Two user sessions can run concurrently on the same computer. A module executed by a first user instantiates a session manager in a first user session. The session manager receives input identifying a second user and providing credentials for the second user. A backup is made of auto-run and logon registry keys. A control file is created that directs actions in the second user session. The second user's credentials are registered in the registry file. The first session continues to execute while the second user is automatically logged on based on the registry auto login keys. The session manager is notified that login of the second user is complete. The session manager rewrites the auto login keys to the first user keys stored in the backup. The second user is logged off. The first user is automatically reconnected based on the rewritten registry keys.