Centralised PC Logging System

I require an application in VB.Net for centralising the logging of users at all terminals by storing their details at a central server. The primary purpose is to control access to users. The users are to be students and teachers of the college. Students can only access as per their time-table / schedule given to them by the college while teachers can access any time. The salient features of my requirements are: >1>The application must be the first service to run upon windows logon and it must prohibit anyone to use the system unless he/she specifies their correct user details. >2>The application cannot let the user bypass it. >3>Upon successfull input of details by user, the application must minimise to system tray. >4>The application should have a Local Messenger with offline delivery capabilities and also a timer. >5>The system tray icon should have the option to let the user re-run the application by logging the user off from the system and thus restating our own application by again asking for user details from either same or different user. >6>All user activity must be logged on to a central database,preferably Ms-Access. >7>All user details must be saved on a central database,preferably in Ms-Access. These details should be compared to user input when the user tries to logon. >8>The database should have a time-table / schedule which can be easily modified by administrator through a module in VB. >9>The administrator module should have the ability to show and print reports by various search criteria. >10>The user or client modules to be installed on local systems must have option to change their passwords. >11>The administrator must have both local & central access capability.