How to solve Unable to restore Unknown Error (47)?

Hi, I'm at my wit's end now. Initially I couldn't complete my restore,and the bar froze. Then after leaving it overnight, and I saw that it was still frozen there, I disconnected the phone. For hours I've been trying to restore my iphone but all I keep getting now is an error 47. Tried restoring from another computer, removing itunes, installing the latest version, but still nothing. Please help. Thanks..

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