Application Enabler is supported when Windows UAC is enabled. However, to use Application Enabler when Windows UAC is enabled, your enabled third-party applications are required to be running at the same UAC level as Application Enabler. If you are enabling an HTML-based application, Internet Explorer's Enable Protected Mode option cannot be selected. When this option is not selected, Internet Explorer runs at the default UAC level, which is also the same level as Application Enabler.