In Internet Explorer go to the Tools menu, and then select Internet Options.
In the Internet Options window, select the Security Tab and click on the Internet Icon. With the Internet icon selected, click on Custom Level.
Look through the list of options presented and you will find the option "Download Unsigned ActiveX Controls".
By default it will be set for Disabled, for the remote viewing software to work correctly we will need to set it for "Prompt".
Click on OK twice, and select Yes if prompted about changing security options