Why did microsoft put this on the windows system if its a secruity risk?

What you should know about running scripts and ActiveX controls in Internet Explorer

Be cautious about allowing Web sites to run scripts or ActiveX controls on your computer. While these items can enhance Web browsing, they can also be a security risk, and it鈥檚 best to avoid using them when you can. However, some Web sites or tasks might require them and you will have to decide whether to trust ActiveX controls that Internet Explorer blocks for your safety.

What are scripts and ActiveX controls?

Scripts, ActiveX controls, and other Web browser add-ons are used extensively on the Internet. They can make browsing more enjoyable by providing toolbars, stock tickers, video, animated content, and more. These programs can, however, malfunction or give you content you don鈥檛 want. In some cases, these programs can be used to collect information from your computer in ways you might not approve of, possibly damage data on your computer, install software on your computer without your consent, or allow someone else to control your computer remotely. Given these risks, you should only install these programs if you completely trust the publisher.

What should you do about ActiveX controls and scripts running on your computer?

Use the default security settings in Internet Explorer. These settings will help protect you. If you feel like you need more protection while browsing the Internet, it's OK to increase your browser鈥檚 default security settings.