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  1. Join Date : Oct 2013
    A Finnish ex-pat in Germany
    Posts : 9,047
    Windows 10 Pro
       01 Jul 2015 #300

    The new RSA keys are not the only change I made to the script when editing it. But OK, let's do it as you seem to suggest: next time the new keys are needed I just post here telling about it and ask the newbies to find the correct keys and fix the script by themselves.

    Let me just check that I get you correctly: for some reason you are not satisfied that every newbie can convert the ESD to ISO following instructions in this tutorial? Too easy? Should be more complicated?
      My System SpecsSystem Spec


  2. Join Date : Jan 2014
    Posts : 927
    Windows 8.1, 10
       01 Jul 2015 #301

    This discussion has been quite helpful to me, as I now understand (I think) what I was doing wrong.

    It seems I was grabbing the ESD too early, while it was still encrypted? Therefore the encryption keys in the script weren't working as they weren't the latest ones?

    If I'd got the ESD later in the process, or if it was still being saved in that RecoveryImage folder, then the original encrypted ESD would have been replaced by a decrypted version, which can be read with DISM etc., and the older keys wouldn't have mattered.

    Is that what was happening?
      My System SpecsSystem Spec


  3. Join Date : Oct 2013
    A Finnish ex-pat in Germany
    Posts : 9,047
    Windows 10 Pro
       01 Jul 2015 #302

    David, that's about correct. The included RSA encryption keys could not decrypt the ESD file if it was in encrypted state.

    That's also the reason I decided to include a new script, instead of replacing the old one. I want to keep this so simple every newbie who can read can make his / her own ISO image.

    Both scripts can decrypt both encrypted and unencrypted ESD files.
      My System SpecsSystem Spec


  4. Join Date : Apr 2015
    Posts : 9,115
    W10Prox64
       01 Jul 2015 #303

    Okay I need more coffee......LOL
      My System SpecsSystem Spec


  5. Join Date : Jun 2015
    Posts : 4
    Windows 10 10158
       01 Jul 2015 #304

    Kari said: View Post
    Let me just check that I get you correctly: for some reason you are not satisfied that every newbie can convert the ESD to ISO following instructions in this tutorial? Too easy? Should be more complicated?
    I am a newbie, and I grabbed and converted the 10158 ESD to ISO without any difficulty by following your instructions exactly. Thanks buddy, don't change anything!
      My System SpecsSystem Spec


  6. Join Date : Oct 2013
    A Finnish ex-pat in Germany
    Posts : 9,047
    Windows 10 Pro
       01 Jul 2015 #305

    Let's try to clarify this. If you are simply looking instructions to see how to make an ISO, do not read further, simply jump to the first page, download the tool and follow the simple instructions.

    For those reading further, here's how it works when told quite simplified.

    Microsoft uses the so called RSA encryption for it's Electronic Software Distribution (ESD) files. In case of Windows 10 build upgrades, Windows Update downloads the package, unpacks it and finally decrypts the files in it. Not the other way around even if it would seem more logical, the install.esd just unpacked is still encrypted. The ESD file is basically an archive containing the boot.wim, install.wim and other files needed for Windows upgrade and installation., all other files in the package needed for the unpacking and decryption.

    Windows 10 build upgrade files are always encrypted when downloaded to your computer through Windows Update.

    When you see the download in Settings > Update & Security > Windows Update reaching the full 100%, the next step is to unpack the archive. When this starts you will see the text Preparing to install updates. If you now monitor the C: drive you will see system creating the working folder C:\$Windows.~BT\ and starting to unpack the files from the archive. The file we are interested in, the install.esd file will be unpacked to the subfolder Sources (C:\$Windows.~BT\Sources).

    Follow the progress in Settings > Update & Security > Windows Update; when Preparing to install updates reaches about 50%, the unpacking has been done and Windows starts the final phase before the upgrade itself starts and decrypts the files.

    Those who just want to upgrade need to do nothing. Just relax and let the system download, unpack and decrypt the files and Windows will upgrade itself. Those like me who do not want to wait an extra hour or so for the upgrade to finish but want the ISO instead as soon as possible have a little bit stress now: the ESD needs to be grabbed and taken to a safe place as soon as it has been unpacked but still encrypted because if we wait until the decryption is done before we start the copy process, the upgrade process will start before the copy process has finished and the file we are currently copying disappears.

    I repeat that the above is a "verbally illustrated" and simplified description of the real process but I hope you got it .

    Kari
      My System SpecsSystem Spec


  7. Join Date : Apr 2015
    Posts : 9,115
    W10Prox64
       01 Jul 2015 #306

    Okay so, I am back on my lappy with 10159 installed now, and the install.esd is still in the Sources folder, and it's still the same size as when I grabbed it, and (as someone mentioned somewhere else that the 10159 is slightly smaller than 10158), mine is larger than 10158 - could be because mine is 32 bit? Anyways, if I look in C:\RecoveryImage, I find the install.esd from April sitting there!
      My System SpecsSystem Spec


  8. Join Date : Oct 2013
    A Finnish ex-pat in Germany
    Posts : 9,047
    Windows 10 Pro
       01 Jul 2015 #307

    simrick said: View Post
    Okay so, I am back on my lappy with 10159 installed now, and the install.esd is still in the Sources folder, and it's still the same size as when I grabbed it, and (as someone mentioned somewhere else that the 10159 is slightly smaller than 10158), mine is larger than 10158 - could be because mine is 32 bit? Anyways, if I look in C:\RecoveryImage, I find the install.esd from April sitting there!
    This note from an earlier post in this thread:

    Kari said: View Post
    Note   Note
    To be prepared for the next build upgrade you might want to delete the file DONOTREPLACE.txt in C:\RecoveryImage. If the file is present when upgraded to next build the install.esd file will not be replaced with the new one. Windows will be upgraded but the esd file in Recoveryimage folder will remain build 9860.

    Kari
    The Recoveryimage folder is used to revert the upgrade, go back to the build from which you upgraded. That's why it contains the old ESD file.
      My System SpecsSystem Spec


  9. Join Date : Jun 2015
    Posts : 1,583
    Windows 3.1 to Windows 10
       01 Jul 2015 #308

    WOW..


    MS encrypted esd downloading version 10159
    Attachment 22967

    MS encrypted esd = you must rename from .default_ext to .esd and then run through the decryption process of this program
    note: this is an encrypted file and the programs crypto keys will decrypt this file
    Attachment 22968

    pictured below, the decrypted install.esd is usable at about 25% - as you can see I'm already creating the ISO at 29%
    when the file fist appears it will show the size - but if you snag it to fast - the file may not have been fully written and the program will fail with > "ERROR: Specified file is not found or damaged."

    better off waiting until (the preparing to install updates - progress slows to a crawl)
    (this install.esd is NOT encrypted, nor does it require decryption - it is just running through the index export process within this program)
    Attachment 22969

    Note: usually the setup media contains a single index install.esd - so far with windows 10 preview it has been the full 4 index install.esd (which is actually used to create the setup media)

    once the 4 indexes are exported into a folder - the ISO creation process starts within the program

    Or you can just wait and copy the install.esd to another folder just before to requested reboot
    Attachment 22972

    Enjoy!
    KYHI
    Last edited by Kyhi; 01 Jul 2015 at 15:44.
      My System SpecsSystem Spec


  10. Join Date : Jan 2014
    Posts : 927
    Windows 8.1, 10
       01 Jul 2015 #309

    Thanks for posting the revised tool. I can now decrypt the 10159 ESDs I grabbed yesterday (and I guess 10158 too, although I'm not sure I'll bother), and it seems to work.

    And the x64 en-gb ESD has downloaded tonight too - 24 hours ago, 2 separate machines were both refusing to admit the 64 bit version existed.
      My System SpecsSystem Spec


 
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