Aggrevation!!!!!

I swear to god I will kill some one if this thing gets any freaking worse. My internet won't work. It says that i have the connection it says that there is no problem but when I go on it gives me that crap about how the web page can not be accessed or whatever. when I diagnose the problem it says some thing about my proxy server that makes no sense to me at all my parents won't help me at all and complain when i want to use their computers all the time when this happens. can anyone tell me how to fix the problem where there is no problem this is so annoying it happens all the time not allways this but normaly something retarted like this. >.<