update for windows 7 for x64 based systems (KB2545698)win update error-(80073712)

[System]

every time i use win update to install update then update for windows 7 for x64 based systems (KB2545698) always fails i tried to download and install but hen also fails this time i thought to create question so please help one time on update was on and
electricity was gone so became off my pc when it wass in blue screen which we say logg off screen so help

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