Screensaver does not work in windows 7

[Arkady54]

Screensaver does not work in my W7

[rkonit]

First thing... Are rest of Aero features working or not?
If it is not...then this issue may caused by the video card or its device drivers. So first I suggest to go on vendor website and get new drivers.

[HappyAndyK]

Also run system file checker "SFC /SCANNOW" and see if it helps.

[vasudev]

Which ver of Windows 7? I think Starter doesn't support Themes & screensaver by default.
From start type 'Screensaver' and clcik on 'Change screensaver' to open the dialog to try.