The ActiveX Installer Service enables IT professionals to manage the deployment of ActiveX controls by using Group Policy on computers in an organization. ActiveX controls are self-registering COM objects that are used to provide a more interactive user experience when using Internet Explorer. ActiveX controls are often distributed in .cab files. By default, standard user accounts do not have permission to install ActiveX controls.
Check out this article on how to get the most out of using Group Policy to control the ActiveX Installer Service:
Thomas W Shinder, M.D., MCSE
Sr. Consultant / Technical Writer