Why can’t I access sites such as LinkedIn or Photobucket on the internet on my computer?

Question From User - Answers in Comments.

I can't get passed the "Cannot Display" Page.

No matter how many times I refresh the page or try anything else, the internet cannot load these sites.

However, on other people's computers and my computer at work, the sites load no problem.

How do I resolve this? This is so frustrating. Thank you very much.