What can ActiveX Control do for me? While ActiveX Control is on your computer if you are using Internet Explorer, you can also control it on a case by case basis. Some websites you might visit will require you to use ActiveX Control to view the content. With this option, a pop-up will come onto your screen and you can select to allow it or not. If you decide not to run ActiveX Control, there will be content on the website that you won’t be able to view. Take into consideration that some websites cannot be trusted; in this case do not run ActiveX Control as there is a possibility of security issues.