Why cant my computer connect to facebook, youtube, twitter etc?

[she_woman_cat_type_thing]

It always comes up cannot connect to remote server, People have suggested clearing cookies, cache, disabling firewall etc, just doesn't work. I can Connect to other websites, But social networking such as facebook, twitter just come up with cant connect to remote server. I am an adult, so these websites are not blocked under parental controls or anything, I just want to know why they dont work on my computer? They work fine on my phone on the wireless, just not the computer? Why? My phone and internet both use the same wireless connection? Also youtube only works sporadically on my computer.
Its the same with all browsers, IE, chrome, opera, firefox etc
I have run virus scans, My computer is fine, Just wont connect to these specific websites. I wonder if its something to do with the router.
Been there, done that. Thanks anyway.
This is the same for every computer in my house, My laptop, My sons netbook, 2 old laptops and a desktop computer. But not mobile phones on the same wireless network.
Thanks Jimmy cool, but my computer works fine, I don't want to needlessly download expensive and potentially harmful software to correct what is probably a quite simple problem.

[( ͡° ͜ʖ ͡°)]

Maybe a keylogger, or a virus is blocking it, what browser do you use?


EDITED:

Try running a virus scanner

EDITED:
TRY RESETTING YOUR ROUTER

[Roger2517]

I think there are two possibilities:
1. There is something wrong with internet settings(IPv6 settings).
2. You got your machine infected.

[Jimmy Cool]

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[fern]

If its happening to every one of the laptops, then its something with your network, contact your network, and ask them? Check, are you sure nothing is blocked?

[Samiul]

First of all, the “Welcome to nginx!” page you see is NOT our website. At nginx, we write and distribute a free open source web server software. A web page saying “Welcome to nginx!” is just a diagnostics response that can be produced by any of the websites out there, running nginx web server. Currently, nginx is the 2nd most popular open source web server in the world, it’s being used by over 70,000,000 (or 10% of the Internet) websites. Most of these websites are legitimate, but some aren’t. Our software was created with a good reason of enabling performance and scalability on the Internet, it is licensed under popular open source license, and has nothing to do with any kind of threatening or malicious activity per se — nginx is NOT a malware, and it is NOT on your computer. But someone’s malware could have indeed tampered with your computer or router, redirecting you to a fraudulent Internet server.