How To Unblock Dune Buggy I Can't Access Facebook Anymore. Get Msg. IE Can't Display This Webpage. How Can I Unblock It?

I can't access facebook anymore. Get msg. IE can't display this webpage. How can I unblock it? - how to unblock dune buggy

My husband's company put a computer at home and I think that this is blocking the network or firewall now every site, especially Facebook. I read online that you can download free proxies to unblock this page. There are so many to choose from, I wonder who is a free and secure. I downloaded one UFAP called Unlbock Facebook proxy to access something, but nothing happened and I could not still on the site. It is simply frustrating to have everything so if I can help anyone appreciate a good indicator for the download. Thanks