Links in Facebook

Hello,

I was having trouble with Facebook saying page can't be displayed so I reset my settings in Internet Explorer. This fixed the display problem but now when ever I click on a link in Facebook I get the following. This happens on all links

Sorry, there was a problem with this link:
You can now continue to this website, or go back to the page you were on before.
Remember, only follow links from sources you trust.

Can you please tell me what I unchecked that I need to put back in? Thanks