This programs require a Java enabled browser. With the latest Java 7 Update 51, you may need to add http://freejigsawpuzzles.com to the "Exception Site List" on the Security Tab of the Java Control Panel and change the security level from "high" to "medium" only if you still have a problem. How To access the Java Control Panel. Click on the Security Tab and move the slider to Medium, this will allow the puzzle applet to load with security prompts. You can also add http://freejigsawpuzzles.com to the Exception Site List while on this same tab. Click Apply and then click OK.