Problems with internet

[Darius]

I don't think portforwarding is required here, however Darius may want to check if someone's modified some of the router's settings. Also you might want to try disabling any firewall software and trying again, or even try from another computer on the network. This could help get to the cause of the problem. If the problem affects both computers and you haven't changed your router settings, then a call to your ISP might not be a bad idea.

I've disabled the firewall and tryed again, didn't work. And sadly I only have one computer so I can't try using another one.
How do I check if somebody had modified my router's settings? (Yes, I'm a noob at this stuff)