PC Lockup is a security tool for your PC, that lets you establish a password for your Windows operating system, and restrict its use by others while you are absent.
You can configure it to start automatically with Windows, and it has various tools that let you hide the desktop while it shows an image you can change to your taste. PC Lockup is a very useful application if you have children at home, as it has an option that tells you how long the PC is used for, or you can restrict access to it at a set time.
PC Lockup also lets you adminster the energy saving options and the screensaver, and password protect them so no-one can change or remove them. It has a simple and easy to use interface, designed for all types of users, from novice to expert.