There are some simple steps to use for that.
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Put windows CD in CD Rom and boot from the CD.
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Then your PC will copy the files.Let it be done.
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Then a window will open in front of you and you will see a option of Automated Recovery Console.
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Then press F2 and a process to copy files will start again.
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After the process finish,then restart your PC and start it normally.
I am sure after this process your PC will be start well.