"Science" And "The 60's USA" Screen Savers Do Not Work Properly
When your screen saver activates, the desktop displays a blank screen.
This behavior occurs if you do not have a background selected, you have either the Science or the The 60's USA screen savers selected, and all open windows are minimized.
To resolve this issue, follow these steps:
Microsoft has confirmed this to be a problem in Microsoft Windows Millennium Edition.