To set a security level for each zone
In Internet Explorer, on the Tools menu, click Internet Options.
Click the Security tab, and then click the zone that you want to set the security level for.
Under Security level for the zone, select Default Level to use the default security level for the zone, or click Custom Level, and then select the settings you want.
For Restricted sites, you need to click Custom Level and then click a level in the Reset to list.