Unauthourize a computer that wont boot a certain os anymore, but multiboots

uh dunno where to start, this is a wierd question, and please no one say "contact apple, ask them to deauthorise" or "when you have 5, you can deauthroize all" i know all that, ive done both of those this year, and i dont plan to try again.
ok, i have a multibooting computer, xp,vista,7, and i authorized win7, later on something happened, and now win7 wont boot, it keeps going into startup repair loops, so i plan to format it, but my question is, is there a folder that i can copy, with the auth info in it, that i can copy back to the fresh win7, because its the same hardware, it will accept it, i just dont know where that folder is, obviously i can access any file on the win7 because i can see the hdd from xp and vista, so can anybody help me here?

It's in ProgramData\Apple Computer\iTunes on that HD. Note that changing the OS configuration may cause its existing authorization to be ignored.
(54102)

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    ****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
    2015 Microsoft MVP - Windows Experience Consumer

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