Try cleaning your msconfig file. Shut down anything that you don't recognize.
This will tell you if a program is doing it. If it's not being caused buy a
program, I believe that I remember hearing about a virus that doew this. But,
before you start panicing, also shutdowq any schedueled tasks that may be
scheduled to run at night.

good luck

"DRT" wrote:
[color=blue]
> I have Vista Ultimate running on my new Toshiba S-5034 notebook. In
> the middle of the night, I don't know exactly when, the thing wakes
> up for some reason and sucks up juice! Aaargh!
>
> The notebook gets awfully hot in the bag as the fan struggles to
> keep it cool in the confined space. I am left with a weak battery
> for my commute too :-(
>
> I thought that hibernate was the deepest power saving mode? The
> hardware is completely powered off. It is only that the O/S saves
> the CPU and memory state to HDD right and makes a boot-up "note" to
> itself to restore the image? Therefore, can any task that was
> running in Windows possibly wake up a system in hibernate state? I
> don't think so because they aren't running.
>
> Since the notebook is in my bag with no Ethernet or wireless on, I
> am sure that Wake-on-LAN (WoL) couldn't possibly be the culprit for
> problem or could it?
>
> Yes, I am sure my notebook is in hibernate mode and *not* in sleep
> mode. All lights go off on this Toshiba (there is a standby light)
> and I have unplugged the notebook's battery and power adapter. I
> can successfully resume where I left off after reattaching
> everything and powering back on.
>
> Can anyone offer any advice on this problem? TIA!
>
> --
>
>
>[/color]