Access Controller

From PC-Safety:

Access Controller is a desktop locking security utility you can use to protect your desktop when you are not near your PC. To activate protection, define a password in Options, and select the Lock command. Password protection can be automatically activated on boot or with a click of an icon in the system tray. You can also log access attempts and enforce a custom background image. Access Controller supports a simple messaging system to allow your visitors to leave short messages on your locked desktop. Access Controller gives you two locking methods: with hiding your desktop and using a screen saver; and without hiding to allow others to see what is happening on your desktop. The second method is good for showrooms where you need to demonstrate something to your customers.

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