Looks like other people have the same problem but no resolution. See http://www.vistax64.com/general-discussion/195527-screensaver-wait-time-resets-1-minute.html

>Yes - I don't have any 3rd party screensavers installed - just the default ones from Microsoft.
>
>Everything works fine in Safe Mode - I can reboot to safe mode and the waittime stays whatever I had set it before... but when I reboot back to Normal Mode - then the reset occurs.
>