Need help figuring out my different Windows7 install discs

Discussion in 'Windows 7' started by Tango1, Dec 25, 2013.

  1. Tango1

    Tango1 MDL Novice

    Dec 25, 2013
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    Over the past years I've aquired different windows 7 x64 versions on Disc, both ISO burnt to DVD and the discs I got with my store-bought laptop. Being an obsessive compuslive guy who needs to know everything I'm now obsessing with figuring out the authenticity of my discs. The W7 Home edition DVD's that came with my laptops are no biggie. Two other ISO's I aquired through MSDN for work back then as db-analyst are fine as well and SHA numbers match with the ones on MSDN. However I got 1 disc I copied to disk and the SHA1 numbers don't match with any on MSDN.I understand Win 7 ISO's can be modified. All Discs actually contain all different versions. Modifying just 1 small configuration file to install any version, could therefore have changed the whole checksum for the ISO. Meaning if the checksum doesn't match any on MSDN it doesn't mean it's not legit.

    My question is if you could all help me figure out what might have been changed this ISO to make it have an "unofficial" SHA1 number. I hope to learn about windows7 installation discs as well.

    Here's the information for this 1 disc:

    directory dates: 7/14/2009/11:29
    size on disc: 3,224,686,592
    iso size: 3,224,698,880
    SHA1: c162759fb80c07f93ad3e28ca307a3aee5c52715

    Windows Media-player seems not to install automatically with this version, so it could have been removed or opted out though a configuration file that has been modified. Do not know if mediaplayer could have been removed entirely. Not sure. Any other options also possible. What should the next move be?
     
  2. MrMagic

    MrMagic MDL Guru

    Feb 13, 2012
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    My guess, Windows 7 Ultimate N x64 RTM Retail

    The N editions of Windows 7 allow you to choose your own media player and software required to manage and play CDs, DVDs, and other digital media files. If you choose to use Windows Media Player 12, downloading it, along with related software, is free.
     
  3. PhaseDoubt

    PhaseDoubt MDL Expert

    Dec 24, 2011
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    I had a similar problem a couple of years ago. I finally just destroyed all the disks that were questionable and downloaded the latest versions of what I needed from here and never looked back. I now store all the ISO files on a couple of external HDDS with the names as downloaded. Links provided by this site are very good at very descriptive names.
     
  4. urie

    urie Moderator
    Staff Member

    May 21, 2007
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    That still does not explain the SHA1: c162759fb80c07f93ad3e28ca307a3aee5c52715 that is not official.



    File Name: en_windows_7_ultimate_n_x64_dvd_x16-13641.iso
    Date Posted (UTC): 10/22/2009 8:48:48 AM ISO/CRC: 52E7F771
    SHA1: 045E966D469E6C9ADC0C5318818FBD0F3D20FD91
    or
    en_windows_7_ultimate_n_with_sp1_x64_dvd_u_677543.iso
    SHA1: E01A55499FE9EBA718B59492E55B567F3D6F4E1B
     
  5. MrMagic

    MrMagic MDL Guru

    Feb 13, 2012
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    There is a version of Win 7 Ultimate x64 on TPB with that SHA in the comments, wonder if it's a modded TPB version


    MD5 Checksum: 87E9A141D7BAF8DB996A789A8E6641CF
    SHA-1 Checksum: C162759FB80C07F93AD3E28CA307A3AEE5C52715
     
  6. urie

    urie Moderator
    Staff Member

    May 21, 2007
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    Yeah I found that link also, personally I would dump the disk and download official one if needed :rolleyes:
     
  7. MrMagic

    MrMagic MDL Guru

    Feb 13, 2012
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    Agreed :)
    ___________
     
  8. Tango1

    Tango1 MDL Novice

    Dec 25, 2013
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    #8 Tango1, Dec 26, 2013
    Last edited: Dec 26, 2013
    (OP)
    Agreed.

    And I found that link as well but was waiting for more input. I downloaded a new version from MSDN (with a little help of a friend still active as db-analyst at MS) with a release date closest to the release date of my own mystery ISO. What bugs me is the creation date of the directories on my mystery ISO. It pre-dates any ISO found on MSDN.

    254105a93e945a90159359dea84115b9.jpg
    In other words I still wanna know.. :)

    I'm gonna bit-compare both ISO's to see what I come up with. Maybe it works maybe it wont. any other ideas how to handle this still welcome.

    Think I'm gonna hang around for awhile on MDL.
     
  9. f33nix

    f33nix MDL Member

    Apr 4, 2012
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  10. Tango1

    Tango1 MDL Novice

    Dec 25, 2013
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    #10 Tango1, Dec 29, 2013
    Last edited: Dec 29, 2013
    (OP)
    It seems I do not need to chuck the disc.

    I've put the unofficial dvd in a physical drive and compared against an official ISO from MSDN mounted as virtual drive. BOTH are exactly the same according to Total-commander (synchronize dirs, which bit-compares all files/directories for both sources)


    Windows 7 Ultimate x64

    supposed unofficial iso sha1 (ripped to hdd):C162759FB80C07F93AD3E28CA307A3AEE5C52715
    original iso name: unknown
    install disc name: GRMCULXFRER_EN_DVD
    release date: unknown
    directory dates: 7/14/2009/11:29
    in dvd-drive: 3,224,686,592
    ripped to harddisk as iso: 3,224,698,880

    official sha1:326327CC2FF9F05379F5058C41BE6BC5E004BAA7
    original iso name: en_windows_7_ultimate_x64_dvd_x15-65922.iso
    install disc name: GRMCULXFRER_EN_DVD
    release date: 8/6/2009
    directory dates: 7/14/2009/11:29
    mounted as virtual drive: 3,224,686,592
    on harddisk as iso: 3,224,686,592

    But both are same it seems. Maybe when you rip the burned DVD from the original official iso, back to harddisk, it somehow messes up some data is that possible? Used ImgBurn to rip the "unofficial" disc to hdd.

    So next step is to burn a disc using the official one and then rip it back to disk to see if the hash changes. I do not understand anything about ISO's. Can you help me?
     
  11. PhaseDoubt

    PhaseDoubt MDL Expert

    Dec 24, 2011
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    #11 PhaseDoubt, Dec 29, 2013
    Last edited: Dec 29, 2013
    Nobody said you needed to throw away the disk. Others can speak for themselves, my point was you're expending a lot of effort for no good reason. You could have downloaded a known good disk in about ten minutes and been done with it.