Some pages not opening in Chrome and Firefox

[JumboMuffin]

Some websites open and some don't in Chrome and Firefox, so for example, I can go on reddit, BLF, YouTube, Facebook and many other sites on them both, but so many don't. For example, I can't open imgur or cdkeys, I don't even get an error, the spinner in the tab just keeps spinning forever. Even on reddit, 50% of the links I click on do the same, they open in a new tab and spin forever.

I've tried loads of tutorial videos and none of them worked, what is happening? D:

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[Texan101]

Have you tried turning restarting your router, clearing your cache, flushing your DNS, and have you tried pinging the sites you can't reach?

[JumboMuffin]

Have you tried turning restarting your router, clearing your cache, flushing your DNS, and have you tried pinging the sites you can't reach?

1) Yes
2) Yes
3) Yes
4) No

I'll give the last one a go :D