Does anybody know how to unblock school computers?

You have no legal right to tamper with the settings on your school's network. In the real world this is a criminal offence, but because you're a child, you'd probably just get expelled. You are st achool to learn - not to visit random websites

use proxy websites like http://www.kproxy.com for a list of proxy websites just do a google search

search in google ultrasurf download it run it off ur usb then u can go to any site

They are blocked for a reason. You are at school to learn, not to goof off on the internet. Try focusing on that instead.

We highly recommend using vpnpower.net to unblock web-sites. I am using their services for more than 4 years without having troubles.

Your school or work filter can easily detect a proxy the very minute you try to use it and either block it on the fly or notify an admin to block it manually. There is no proxy that these new filter techniques cannot stop. At the end of the day all proxy's will eventually get blocked. As the filtering software gets more advanced they will get blocked faster and faster. There is also the question of the rules and laws you are breaking by trying to hack their security system. Finally even if you get a proxy to work for a short time you are inviting the proxy owner, many of whom are using the proxy for hacking purposes, to infect and or hijack your school or work network. Read more on the problems with proxies below.

I would recommend you http://www.joeri.de working great and It's my favorite proxy.

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