I can't help solve the problem (even though I bet it's solved by now) however, I can give you a tip if there are still troubles with anything else on that network. The problem isn't with your computer, it's your network. Your network is set for restricted mode, and unless you switch wifi networks that won't change. (unless you change it)
(Also im kinda having the reverse problem: trying to figure out how to turn restricted mode ON for a network, if you managed to turn it off that would be nice to know how XD)
(EDIT: seems like there are still other ppl that want it off; coming here and finding no answer. Try resetting your router to factory default, cuz like I said: it's not your computer, it's your internet connection.)