When to install ActiveX controls in Internet Explorer 9
ActiveX controls and web browser add-ons are small programs that are used extensively on the Internet. They allow you to use toolbars, stock tickers, video, and more when you browse the web. However, these programs can sometimes malfunction, or give you content that you don't want. In some cases, these programs can be used to collect information from your computer, damage information on your computer, install software on your computer without your consent, or allow someone else to control your computer remotely.
Consider the following questions before you allow a website to install an ActiveX control on your computer:
Do you trust the website providing the control?
Don't install an ActiveX control unless you trust the website that's providing it. For information about how to decide if you can trust a website, see When to trust a website.
Do you know what the control is for and what it will do to your computer?
The website should tell you what this add-on or ActiveX control is for and provide any special details you need to know before you install it. If this information isn't available, you shouldn't install the control.
You can also turn on ActiveX Filtering to control which websites use ActiveX controls on your computer. For more information, see How to use Tracking Protection and ActiveX Filtering.