Add a Trusted Site
In IE go to Tools > Internet Options. Then select the Security Tab. If you don't see the toolbar displayed at the top of the screen hit the ALT key on your keyboard. You can also reach Internet Options by selecting the cogwheel in the upper right corner.
Click on Trusted Sites. Then click the Sites button.
In IE go to Tools > Internet Options. Then select the Security Tab. Select Trusted Sites, then select Custom Level...