ActiveX controls are programming language codes designed specifically for the Windows operating system and the Internet Explorer browser to display animation and other interactive data on a website. ActiveX controls are interchangeably used by the applications that require a specific part of a programming code that can be "borrowed" from ActiveX. You need to enable your browser to run ActiveX controls and then accept the download and installation when prompted by a website. ActiveX controls are one of the primary pathways for virus and spyware infection: Install ActiveX controls only from trusted sources.
Always have an antivirus or an antispyware program, or both, activated before downloading an ActiveX control.