How to resolve "your security settings have blocked an untrusted application from running

Adds your website to "Exception site list" on "Security" tab on Java control panel.

Where is the Java Control Panel on Windows?

Find
the Java Control Panel - Java 7 Update 40 (7u40) and later versions

Starting with Java 7 Update 40, you can find the Java Control Panel through the Windows Start menu.

Launch the Windows Start menu

Click on Programs

Find the Java program listing

Click Configure Java to launch the Java Control Panel

Find the Java Control Panel - Versions below 7u40

Windows 8 

Use search to find the Control Panel

Press Windows logo key + W to open the Search charm to search settings

OR

Drag the Mouse pointer to the bottom-right corner of the screen, then click on the Search icon.

In the search box enter Java Control Panel

Click on Java icon to open the Java Control Panel.
Windows 7, Vista

Click on the Start button and then click on the Control Panel option.

In the Control Panel Search enter Java Control Panel.

Click on the Java icon to open the Java Control Panel.
Windows XP

Click on the Start button and then click on the Control Panel option.

Double click on the Java icon to open the Java Control Panel.