Pwr / screensaver not running

Vista Business updated on Dell Vostro
No hw connected other than a recent HP printer, which is switched off when
not in use. No drivers updated, in fact there are no updated chipset / video
drivers available, only Vista critical updates added
PC belongs to Her indoors; Niether the Pwr Saving options kick in, nor does
the Vista std.screensaver, set to 10 mins. Excepting pwr options do appear
to kick in overnight. (PC left on) This is a recent problem
I've altered Pwr saveing options to no avail.
Any clues?
T/Y

Solved
Ammended Device manager USB hub's pwr settings

"DL" <> wrote in message
news:e3lZBJ$...
> Vista Business updated on Dell Vostro
> No hw connected other than a recent HP printer, which is switched off when
> not in use. No drivers updated, in fact there are no updated chipset /
> video drivers available, only Vista critical updates added
> PC belongs to Her indoors; Niether the Pwr Saving options kick in, nor
> does the Vista std.screensaver, set to 10 mins. Excepting pwr options do
> appear to kick in overnight. (PC left on) This is a recent problem
> I've altered Pwr saveing options to no avail.
> Any clues?
> T/Y
>