Are you using a wireless mouse? I had the same problem and I was using a
Microsoft wireless mouse.
Try going to the Microsoft site and downloading the following:
HD-NON-USER INPUT DATA FILTER.
It worked for me.
Good luck
Sharyn Mitchell

"chobynne" <chobynne@discussions.microsoft.com> wrote in message
news:8AB088BE-F5C8-4E7A-AAAF-22C84104F1D2@microsoft.com...
>I got Vista and my screen saver doesn't work. I choose one , 2min time ,
> click apply,ok .then I wait 2 min. but it doesn't activate. Am I doing
> something wrong? Thank you