CRELOADED- Clean up of Malicious Code + https warning

We are looking for an expert developer to clean up malicious code on our CRE Loaded site and secure it. As well, when using internet explorer, we have two sites that are prompting the following warning when the site goes from a http to a https page. "This page contains both secure and nonsecure items. Do you want to display the non secure items? Yes or No" No matter if you click "Yes" or "No", the following error message is prompted: "Internet Explorer cannot open the Internet site [login to view URL] Operation aborted"