在Windows Server 2003中设置cronjob /预定任务? Php和Mysql

I would like to set a scheduled task/cron job to update database. I planning updating the database using a php script, i.e connect to database and execute SELECT and UPDATE query. I already prepared the php script, and what should I do next?

I am (my server) is using Windows Server 2003, IIS, php and mysql.

When I google this, I got tons of results, and its confusing me. Is there any quick explanation of what should I do (step-by-step)?

(Please let me know what are the others information you need to know)

In windows schedule task, define a task to download a file(http://127.0.0.1/autotask.php) every day (or minute)

then put your code in autotask.php