This article was previously published under Q300891
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After you upgrade to Internet Explorer 6, all Web content zones are set to "Custom" on the Security tab in the Internet Options dialog box. As a result, the slider that you use to set your security settings is missing.
This behavior can occur because the default security settings have changed in Internet Explorer 6. All Web content zones are set to "Custom" to indicate that your existing security settings do not match the new default security settings.
For additional information about changes to the security zones settings, click the article number below to view the article in the Microsoft Knowledge Base:
300443 A Description of the Changes to the Security Settings of the Web Content Zones in Internet Explorer 6
To work around this behavior, for each zone when you want to use the recommended default settings or when you want to use the slider to configure your security settings, click Default Level. Then, you must re-configure any customizations that you have made to your security settings.