ShutxDown

Shut x Down is a compact program that can be used to shut down, log off, or restart your computer after a set amount of time or at a given date and time.

This is particularly useful when you're using a notebook and need to leave but want some operation to complete. It also includes a stopwatch to time whatever you want. It's very efficient and reliable and it won't waste your system resources or give pointless add-ons.