Unless you are not using SiteKiosk under the limited SiteKiosk user account (default), you will not have to pay any further attention to this option as SiteKiosk will automatically be set as the default browser for this user. Advantage: If another application (e.g. Messenger) opens an HTML link, this link will be opened directly in SiteKiosk instead of, for instance, Internet Explorer (which would consequently be blocked by SiteKiosk).

You can define the necessary settings for other user accounts under "Start/Control Panel/Add or Remove Programs/Set Program Access and Defaults" or, in Windows 7, under "Start/Control Panel/Programs/Default Programs." Simply set SiteKiosk as your default Web browser in this section. You can change this setting again at any time.