This is a message from Microsoft telling you that the website you’re visiting (www.medprocomp.com) has both secure and non-secure content.
MedProComp operates in a Secured Socket Layer (SSL), and displays secure and non-secure content. You can disable this message in Internet Explorer by:
Going to Tools>Internet Options in Internet Explorer;
Go to the Security tab;
Click the Custom Level button;
Find the “Display Mixed Content” selection and select “Enable.”
There are a number of Microsoft articles on this subject, one of which is HERE.