This works very well sometimes. Put the blocked site link in the address bar go to your tool bar and double click the local area connection disconnect the internet and reconnect then quickly go to the blocked website it should be unblocked it may take a few tries to get it to work if you do this enough times it will stay unblocked and if you want it to stay unblocked for every time you use the computer put it in standby mode if you turn it off you will have to do it again and again.
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