Screen Saver on Vista Windows Freezes

[The Cat's Meow]

My screen saver Aquarium comes on after 10 mins until my system powers down.
There are times that when I return to my computer to use it, the screen
saver is frozen on the screen and I have to turn the computer off and back
on.
What causes this?

 

[Synapse Syndrome]

My screen saver Aquarium comes on after 10 mins until my system powers
down. There are times that when I return to my computer to use it, the
screen saver is frozen on the screen and I have to turn the computer off
and back on.
What causes this?

Bugs. I often get all sorts of problems with the screensavers.

ss.