To change the screensaver:
Right click with the mouse on an empty space on the Desktop, choose
Properties.
On the new window that comes up, click on the Screensaver
tab. You can change your screensaver
by clicking on the drop-down
arrow at the right of the window marked
Screensaver, & select the one you want by clicking on it. You
can also can change the time that it takes for the
screensaver to pop up by clicking on the up
or down arrows beside Wait: You can change
the settings on some of the screensavers using the settings button.
Click OK when you have made the changes that you want.