My iphone 4 is not working after i updated it to 4.3.3 still in dfu and cannot function like before, what to do?

My iphone is not working at all it is in dfu mode. i tried to upgrade to 4.3.3 it could not continue upgrading and shows only dfu mode. what to do.
while i tried to upgrade it, it shows white and blue screen, i cant see the apple with the progress of upgrading. please help me

Ahh! You've suffered from two problems: Windows 7 and Impatience!
Turn off all security software and open all firewalls in Windows, restart everything and then try re-entering DFU from the start.
Good luck (because you might need it)!

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