Hey Tom,
There is.
Perhaps the simplest way is to go Start --> Run and type:
at 02:00 /every:M,T,W,Th,F,S,Su tsshutdn /powerdown
this will add a scheduled task to shut the computer down
every day of the week at 2AM (put in whatever time you
want, but it's in 24hr time, that is, 00:00 is midnight,
and 23:59 is 11:59PM).
It'll give you a 1 minute warning, and then a 30 second
warning before shutting off. If you want to be able to
cancel the shutdown, run the following instead:
at 02:00 /interactive /every:M,T,W,Th,F,S,Su
tsshutdn /powerdown
And when it warns you that it's shutting down, it'll also
pop up a dos-box window. To cancel the shutdown, click on
it and hit Ctrl-C (C for Cancel, not Copy)
If you want it to shut down immediately each time with no
warning, run this:
at 02:00 /every:M,T,W,Th,F,S,Su tsshutdn
0 /powerdown /delay:0
If you ever want to mess with it, you can open up
Scheduled Tasks in the control panel, otherwise, if you
just want to delete job (to not run anymore), run:
at 1 /d
hope this helps,
Carl