Intermittant screen saver

It seems for maybe the past couple of weeks it seems that sometimes the
screen saver doesn't kick in.
When the time for it to kick in comes the monitor just goes right to sleep.
The odd thing is after I go and
check the power settings, which all look fine, it works as it should. I have
tried different screen savers as
well as changes the timers. I don't know if this is from 1 of the last batch
of MS updates or is there maybe
a corrupt file or something. Any ideas are appreciated. TIA