Indeed, Cron/Crontab is the way to go. Look it up on Google. There are various Windows crontab tutorials as well.
You're cron command might look something like this:
10 10 * /usr/local/bin/php -f /path/to/your_php_script.php
OR ( if you can't run PHP scripts with php -f )
10 10 * /usr/local/bin/lynx http://www.yoruserver.com/your_script.php