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  1.    19 May 2017 #11
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,399
    Windows 10 IoT

    Quote Originally Posted by cruzified View Post
    This may of been the case some years ago but is not so now. Windows ISO's are constantly changing. You can see this by mounting the ISO and running the command dism /Get-WimInfo /WimFile:H:\sources\install.esd /index:1. With 2 ISO's of the same build, version, and architecture, downloaded 3 weeks apart with MCT. It shows different size, different amount of directories, different amount of files, and different creation dates.
    The MCT download will be unique to you, as far as checksums hash values go, every time you download it. Some files and directories will have that date and time. The creation date will be the date and time you did the download on. How often the actual download image is updated I have no idea, only Microsoft knows that. My MSDN ISO's though are fixed in time with a verifiable hash code. For the most part they are what I use here at home. For most people though, the MCT is the only option.
      My ComputerSystem Spec
  2.    19 May 2017 #12

    When it comes to verification, the ISO's at MSDN are the same as Techbench (AFAIK)...

    However, the MCT downloads an ESD that has a hash (see products.ini) and as correctly stated the hash of the resulting iso created will differ based on date-time created (I guess we will just have to trust that MCT will only create an iso after checking the ESD hash)
      My ComputerSystem Spec
  3.    19 May 2017 #13
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,399
    Windows 10 IoT

    Forgot about Techbench.
      My ComputerSystem Spec
  4.    19 May 2017 #14
    Join Date : Jul 2015
    Posts : 9,329
    Windows 10 Pro

    Quote Originally Posted by cruzified View Post
    This may of been the case some years ago but is not so now. Windows ISO's are constantly changing. You can see this by mounting the ISO and running the command dism /Get-WimInfo /WimFile:H:\sources\install.esd /index:1. With 2 ISO's of the same build, version, and architecture, downloaded 3 weeks apart with MCT. It shows different size, different amount of directories, [FONT="]different amount of[/FONT] files, and different creation dates.
    The ISO file may be constantly changing, but it is not being constantly updated. You can tell which version of the ISO file MCT is going to download before it downloads it. Run the MCT. Just after accepting the EULA, look in C:\$Windows.~WS\Sources and open/edit the products.xml file there. Inside the products.xml file you will find the references to the esd files that MCT is going to download to create the ISO file from. For example:

    Code:
     <File id="375320">
                <FileName>15063.0.170317-1834.rs2_release_CLIENTCombinedN_RET_x64fre_en-us.esd</FileName>
                <LanguageCode>en-us</LanguageCode>
                <Language>English</Language>
                <Edition>ProfessionalN</Edition>
                <Architecture>x64</Architecture>
                <Size>2861869874</Size>
                <Sha1>e162b8d78194d8fb9cd47180b9574292d559af5a</Sha1>
                <FilePath>http://fg.ds.b1.download.windowsupdate.com/d/Upgr/2017/03/15063.0.170317-1834.rs2_release_clientcombinedn_ret_x64fre_en-us_e162b8d78194d8fb9cd47180b9574292d559af5a.esd</FilePath>
                <Key>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</Key>
                <Architecture_Loc>%ARCH_64%</Architecture_Loc>
                <Edition_Loc>%CLIENT_N%</Edition_Loc>
                <IsRetailOnly>False</IsRetailOnly>
              </File>
    This is from the MCT I just downloaded a couple of minutes ago. It is going to download build 15063.0 dated March 17, 2017. When the MCT creates the ISO file from the esd file, some of the other files in the ISO will get a current created on or modified date. That is why the checksums on the ISO files change constantly.
      My ComputerSystem Spec
  5.    19 May 2017 #15
    Join Date : Jan 2017
    Posts : 43
    Win 10 home version 1703
    Thread Starter

    Thanks!


    Thanks for the insight, info, etc. Good to know how the check the build of the download beforehand. I knew how to check this after the download but not before.
      My ComputersSystem Spec

 
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