After setting your security level to high for the Internet, you should start to add trusted web sites that should not have any malicious software. To add trusted sites:
Go to Internet Explorer, select tools, then Internet options....Click the security tab and then trusted sites. There is an option that only allows HTTPS which means the web traffic is encrypted. Typically you will have to unchecked verify site HTTPS for sites that are not encrypted or use only HTTP. The security level for trusted sites is usually set to medium to ensure proper functionality. Once the site is added, the ActiveX and scripting are enable to allow for greater functionality.