Cron is a deamon which triggers certain actions (cron jobs) at configured times. Windows has an equivalent system called Task Scheduler. Calling cron.php at regular intervals will allow, amongst others, the indexation of content the content and to check for updates.
Setting up a cron job under a *nix system is fairly easy.
crontab -e0 * * * * /usr/bin/wget -O - -q -t 1 http://example.com/cron.php0 * * * * /usr/bin/lynx -source http://example.com/cron.php0 * * * * curl --silent --compressed http://example.com/cron.phpSetting up cron jobs on Windows is almost as easy! See Resources below.
Drupal logs information about cron jobs. Once you have configured it, you should see entries in your logs (Administer > Reports > Status report and Administer > Reports > Recent log entries) indicating the status of the related tasks.