ActiveX is an extension to Microsoft's OLE and COM technologies used in applications and on the Internet. Using ActiveX, an Internet browser can interact with your computer more than what is available through HTML. For example, ActiveX allows users to scan their computer for viruses in their browser using free online antivirus scanners or scan their computer for any Windows updates.
Although there are benefits to using ActiveX, there are known security threats and malware that use ActiveX because it can interface outside the browser. Therefore, unless you know what the ActiveX plug-in does and trust the website, we recommend not installing any ActiveX plug-ins.