Access to Facebook blocked

OK - If I had any hair I'd be pulling it out by now.
I've just been asked to look at a small domain which was set up for a small business. A previous Admin, at the owners request, blocked access to Facebook. There has now been a change in policy and it has been decided to remove the block.

The issue is that I can't see where/how it was blocked. Its a very simple set-up. One 2008 DC and Windows 7 clients. The DC providing the DNS and forwarding to the ISPs DNS, no proxy server.

I've checked group policies and can't find anything
I've checked DNS for entries on the DC and can't find anything
I've checked the local machine hosts file and there is nothing.

Yet when I try to go to facebook I just get 'Internet Explorer Cannot display the web page'
If I run the diagnostic from the page it just reports that it can't diagnose the problem.

If I try to access Facebook from Chrome I get 'This webpage is not available'

Any suggestions on where to look next ?
201407-LO-Qu-007

Experts Exchange powers the
growth and success of technology
professionals worldwide.

Try it Free

30 day free trial. Cancel anytime.

Learn More about How It Works

Related Questions Need more help?
We have over 4 million solutions here.

See More Microsoft Operating Systems Solutions

Deeper Microsoft Operating Systems LearningDevelop your expertise with tips, tricks and how to expert articles.

See More Microsoft Operating Systems Articles

Skill Training Video TutorialsExpand your tech skills quickly with five-minute, instructional videos.

See More OS Videos

Experts Exchange powers the growth and success
of technology professionals worldwide.

  • Solve

    Experts Exchange is the tech professional’s trusted, on-demand resource for solving difficult problems, making informed decisions, and delivering excellent solutions.

  • Learn

    With unparalleled access to technical experts, verified real-world solutions, and diverse educational content, Experts Exchange enables personalized development of technology skills.

  • Network

    Experts Exchange gives you the professional exposure and valued relationships key to building the career you want.

Join the Network Today

See Plans and Pricing