I had similar problem. I had to turn off all scheduled system hard drive
defrags. Vista was waking up to defrag the hard drive.


"John F" wrote:
[color=blue]
> Hi,
>
> I haven't found an answer to this one through searching.
>
> Vista Ultimate on my ThinkPad T43p is waking up exactly 6 hours after going
> to sleep. It will not stay in hibernation or sleep for more than 6 hours.
>
> Put it to sleep at 10:45am and it's up at 4:45am on the dot, etc. Put it to
> sleep at 12:15am and it's up at 6:15am on the dot.
>
> I've not found any scheduled tasks that seem to run to cause this. I've not
> started/configured media center. I've checked my power settings and I've
> disabled hibernation after sleep for all power schemes/modes.
>
> Needless to say, this is fairly annoying. Of course, it never happened on
> Windows XP.
>
> Thanks for any ideas/help you can provide.
>
> j.[/color]