It is a known bug.
You will need to install v6.1 or later.
Download the one that applies to your hardware and OS from here:
http://www.microsoft.com/hardware/mo.../Download.mspx

Carlos

"Roy Sallis" wrote:

> Just got a new PC with Vista and my screensaver does not work. A previous
> thread indicated that it could be caused by a wireless mouse. I have a MS
> Intellipoint 4.1. Is this the cause of the problem?