But be sure to either use the Task Scheduler and the associated GUI (should be your option if it is there already), or the default WinNT Scheduler with the at command. The at command does *not* work reliably with the Task Scheduler (there are several MS Knowledgebase articles documenting that).

For choosing the type of scheduling service, my advice would be to choose the one that is on the server by default. Taking into account the fact that the Task Scheduler is the more modern version, and nearly impossible to uninstall cleanly once installed by a friendly other component like Internet Explorer or parts of the BackOffice Suite, the usual choice for a server would probably be the Task Scheduler (so no at command, just GUI).

Christian Lemburg
Brainbench MVP for Perl
http://www.brainbench.com