Automatic Shutdown

I was just wondering if it is possible to on Windows XP to make your computer shutdown at a pre-determined time?

For example, I am downloading something which I think will take 2 hours to download. So I set the download to begin, then I go to sleep or go out.
After it is finished, I want the computer to shutdown automatically to save the electricity. Because I will not be there to shut it down myself, and so would have to leave it on for a long time until I have woken up again.

So can I say that I want the computer to shut down by itself at 10pm, for example?

Try This

If you need a crack or keygen for that program i have one so let me know.

OK thanks, I'll try that :)

Look here also.

These guys are all freeware so no crack,serials, etc. necessary.