So yea if you haven't updated your win system yet, just don't :p at least blacklist that KB2859537 "security update".
Why ? Will fuck up your system, badly, some were luckier and had minor damages, for the others (me included), whole system were fucked, can't overwrite install had to format shit, basically it was even better than any available virus out there.
Microsoft : Pwning your system since ... god knows when :troll:
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