COA worn off

Discussion in 'Windows 7' started by sandy-bridge, May 9, 2015.

  1. sandy-bridge

    sandy-bridge MDL Member

    Feb 19, 2015
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    Hello.

    I have acquired an used Asus netbook with Windows 7 Home Premium, but the key on the Certificate of Authenticity is partially unreadable. I can clearly see the last 3 blocks and the last 2 characters of the 2nd block, but everything else is unreadable. I can see them a little, but not clearly. I have tried running various combinations of keys through the Ultimate PID checker, but haven't got anything valid. So, is there any software that can try to recover a partial product key if a pkeyconfig is provided? Theoretically, brute-forcing combinations should be possible, but I don't have the time to do it manually.
     
  2. Tito

    Tito Super Mod / Adviser
    Staff Member

    Nov 30, 2009
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    Why don't you (legally) go for the OEM:SLP activation??
     
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  3. sandy-bridge

    sandy-bridge MDL Member

    Feb 19, 2015
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    I'd like to have a spare copy of the COA key just in case.
     
  4. pisthai

    pisthai Imperfect Human

    Jul 29, 2009
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    You could call to the Activation Center of Microsoft and ask the Operator for to clarify the Product Key for you! You may need to make a photo of that COA Sticker and send them by Chat/e-Mail or so.

    I had done that a few times in the past via MS Singapore Activation Center and that worked well.

    Normally, for an Laptop with an OEM License you could use the standard Product Key for that Windows 7 version which were pre-installed already. That's what Tito told! Just follow the advice about OEM:SLP Activation on this forum
     
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  5. boscru6469

    boscru6469 MDL Member

    Jan 9, 2012
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    Did you try Googling "Find Windows 7 Product Key"?
     
  6. pisthai

    pisthai Imperfect Human

    Jul 29, 2009
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  7. sandy-bridge

    sandy-bridge MDL Member

    Feb 19, 2015
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    Hmm, I guess I could try that if I were to install Home Premium somewhere. Don't really plan to do that anytime soon though. Is there anything else I could do?
     
  8. sandy-bridge

    sandy-bridge MDL Member

    Feb 19, 2015
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    Every guide assumes that Windows is already installed, which it isn't. Even if it was, I'd be given the SLP key.
     
  9. MrMagic

    MrMagic MDL Guru

    Feb 13, 2012
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    System Restore to before the sticker wore off ;)
     
  10. Tito

    Tito Super Mod / Adviser
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    Nov 30, 2009
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    No, its impossible.

    1. There is no publicly available documentation of pkey2005 algorithm.
    2. Even if its available, then impossible to brute-force the key. If you study the procedure of key construction then its evident that even supplying partial key don't help you much.
    3. Nonetheless, you need to calculate & check 110075314176 (24^8) combinations.
     
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  11. boscru6469

    boscru6469 MDL Member

    Jan 9, 2012
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    Sorry, your post stated you got a netbook with Windows 7 Home Premium and I assumed it was already loaded.
     
  12. Myrrh

    Myrrh MDL Expert

    Nov 26, 2008
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    as long as the sticker exists, you are 'legal' to install that edition, doesn't matter what method of activation you use. SLP is easiest.
     
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  13. John Sutherland

    John Sutherland MDL Addicted

    Oct 15, 2014
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  14. EFA11

    EFA11 Avatar Guru

    Oct 7, 2010
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    is that for an HP? I got a pic of a home prem for HP win7 if you like a COA :D
     
  15. imgwhirl

    imgwhirl MDL Novice

    Jul 13, 2014
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    can you upload a clear photo showing the first 2 blocks? so that we know how unreadable it is. if some are in guessable form then a brute-force is feasible.
     
  16. urie

    urie Moderator
    Staff Member

    May 21, 2007
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    What a waste of time and effort that would be along with discussion again about brute force keygens e.c.t. lets face it he will never get original oem:coa key back.
     
  17. imgwhirl

    imgwhirl MDL Novice

    Jul 13, 2014
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    given we have loaders, yeah it is silly but i did have success recovering a few keys from blurry image of coa stickers before
    the sellers' fault for not erasing part of the key (selling coa exclusively is illicit anyway)