Can't get some websites to load

I am using Windows 8 64-bit and I am having an issue loading certain websites. Twitter and Facebook are the main two. I have tried Chrome, Firefox, IE, Chrome portable, Firefox portable and qupzilla portable. I tried using https as well. http://en-gb.facebook.com loads but once I enter my login details it just comes up with "problem loading page" again. I have run Malwarebytes and SUPERantispyware I have cleared cache's etc and nothing seems to be helping. Any help would be greatly appreciated as I'm almost at my wits end with it.
I should add I've reset my router, restored factory settings but they seem to work on other devices (android phone, old laptop etc).
 
Check and make sure that time/date settings were accurate in your computer. If the problem still persists, try uninstalling Firefox/Chrome and install it back again.

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Hello, thanks for the response.
I've tried this and it doesn't make any difference. I should mention it only appears to be the www. version of the websites. I can access m.facebook.com for example. This is very frustrating as most log in's mirror to www. I have even experienced this issue signing into some of the Google log in pages.
 
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