Sometimes the display settings on a MessageNOW or PlaybackNOW computer can be wrong, regarding the screen savers. Below are a couple screenshots showing how to change them on Windows 7. These are slightly different for Windows XP.
First right-click anywhere on your desktop and this menu will pop up.
Click Personalize, and then click on Screen Saver.
Click on the drop-down box underneath Screen saver, and change to None.
Your screen saver is now off.