You want secure files, applications or your system against unauthorized access, block Viruses, Trojans, make your system available to others but prevent them to use your personal data. Then you've found the solution for this assignment! X-Blocker will help you by all this assignments and offers you much more possibilities!

With Win Control you can not only define the access rights each of your users should have, you can also protect the Windows Desktop from unauthorized manipulation. You can even define access privileges to system functionality for each user. Finally make an end to deleted or moved links, unlicensed copies of programs, unauthorized screensavers and most of the other vandalism to a Windows 2000/NT and Windows XP system users can think of.

SafeLogon is a multi-user and password-based access control utility that enhances and complements the Windows built-in logon and authentication system. In other words, it allows you to protect your system at home and office from unauthorized access, and much more...

PC LockUp password-protects your PC and restricts others from being able to use it while you are away. An allowed time schedule and duration can be defined for each user to restrict access in definite hours.PC LockUp also supports monitor power save options and has some additional useful features like built-in password protected screen saver and network user validation feature for Windows logon to increase your security.

An open-source Delphi program that locks your Windows desktop when you move away (requires webcam)

This program allows you edit access rights for users and groups (advanced file and folder permissions), change owner of the files, view effective permissions in Windows XP Home. Interface of the program is like XP Pro Access Control editor. The program includes even more useful features: Security Wizard, Secure deletion. Get the power of Win XP Pro. And... Make your Windows XP Home like windows XP Professional Now - Get File Security Manager.

Desktop Lock is a powerful computer security software, it locks your pc to prevent others from accessing your private documents or resources, after your computer was locked by Desktop Lock, people will not be able to access your documents, browse your computer, or use programs on your computer. Desktop Lock fully supports all Windows system, includes Windows 2000/XP/NT and Windows98/ME.

Deskman SE allows you to tightly secure desktops and lock computers, and it's suited for both home users and administrators. Combining different options, you can easily achieve the desired level of security. Deskman SE is the most advanced, yet accessible, desktop security manager for Windows 2000/XP/2003.

Care for Eyes can lock screen on time, relax your eyes by force.
Disable some windows hotkey when lock screen,like WIN,CTRL+ALT+DEL,CTRL+ESC,CTRL+SHIFT+ESC,WIN+F,WIN+M,WIN+E,WIN+R etc
Disable taskbar, can't switch to another task.

An open-source Delphi program that locks your Windows system if your Bluetooth phone or device is out of range.

AutoShutdown is a Windows system shutdown manager. The software provides unattended control for a Windows PC: shutdown, restart, logoff, standby or hibernate your computer based on date/time, idle computer time, hot keys or a manually triggered command. AutoShutdown can also monitor battery level in a notebook computer and act while there is still power available. Systems running Windows 2000 and XP can also lock the workstation.

System Locker is a handy utility that allows you to protect your personal computer from unauthorized access. You can use System Locker to restrict access to your PC. It is attractive, secure, and very easy to use. It starts automatically with Windows and optionally locks your desktop upon loading. It hides your desktop on system lock and provides an informative message to other users. You can set start/stop times for users to limit their access.

Access Lock is a system-tray security utility, which enables you to lock your PC with a password by two methods. The first one hides your desktop and shows a screen saver while the second one does not hide it allowing others to watch what happens there. It also prevents unauthorized access on boot, logs the attemps of breaking the lock and allows people around to leave messages while the system is locked.

Access Lock is a system-tray security utility, which enables you to lock your PC with a password by two methods. The first one hides your desktop and shows a screen saver while the second one does not hide it allowing others to watch what happens there. It also prevents unauthorized access on boot, logs the attemps of breaking the lock and allows people around to leave messages while the system is locked.

1st Screen Lock is a password-protected desktop security utility that lets you lock your desktop with a password on boot, or at the time you are leaving your PC. You can use the built-in spy utility that works in background and enables you to spy on your PC users by fixing all user moves in a log file. This is very useful, when you need to know what your children or personnel do at the time you are away.