Bugs

This screensaver puts an army of hungry insects on your desktop. With Bugs, you'll see a number of black, beetle-like creatures march across your screen, eating all the open windows, shortcuts, and icons they can find. We should note that to install this program, you must copy an SCR file in your Windows directory. Some users may see this as an inconvenience, but others may appreciate that it dramatically cuts installation time. You can not only decide how many bugs should appear on your screen, but you also can specify how ravenous they are. The ability to change the background color and enable or disable insect collisions rounds out the feature set. Since it doesn't cost a dime and contains no adware, Bugs makes a decent screensaver for any user who isn't squeamish.