Access Denied XP Description:

Security program that request username and password on Windows load-up and lock your desktop by one mouse click. All unwanted people are getting away from your computer. It is stronger what Windows XP security.
You can see and manage easily user privileges within colored list of users. Empty password users now can be fast detected to prevent unauthorized use of such accounts. Color logs allow you to take knowledge about usage of computer and detect intruder in appropriate time.
Other feature is possibility to disable CTRL+ALT+DEL.