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what does reformating a hard drive do to it? >>
it gets everything off the harddrive lol ... os, data, etc etc lol ..all gona
see if you can boot to safe mode yellowcid, to do this hit the f8 kery during the boot up. it should then come up with a prompt asking you to give it options ... select safe mode .. and go

.. you should be able to get into windows and change the settings. not saying you will though. but its worth a try