Question: My Internet Explorer will not install the ActiveX add-on, what can I do to get this working?

Answer 1: You are using Internet Explorer 64bit. You will need to use the 32 bit version
 -To do this, click the 'Start' Button and start typing 'Internet Explorer'
You should see two entries, one that is just 'Internet Explorer' and a second that has '(64-bit)' at the end.
 - Select the Internet Exploerer without the '(64-bit)'

Answer 2: The Security settings may be preventing the installation. To overcome this you can add a security exception for the DVR. To set this folow the steps below:-
 - Open Internet Explorer
 - Go to your DVR address
 - Do not Install the add-on at this point
 - Select the Tools (cog icon to right hand side) icon
 - Select Internet Options
 - Select the Security Tab
 - Click Trusted Sites
 - Click Sites button
 - Un-tick 'Require server verification (https:) for all sites in this zone'
 - Click Add button (your DVR url should be displayed in the add box)
This will add this to the list below
 - Click Close
 - Set the  Security Level for the zone to Low (slider bar).
 - If the slider is not visible, click Default Level to restore this, then drop the level to low.
 - Click OK
 - Refresh the page, it should prompt to install the ActiveX control
 - Confirm to install

Answer 3: If you are running Internet Explorer 9, you may need to run through compatibility mode.
This is the button to the right of the address bar that looks like a broken page.
When it is in blue, it is enabled.