In this article, we will show how to decrypt and convert an ESD image of Windows 10 to a familiar ISO installation image that can be burned to an DVD or USB drive and used to cleanly install Windows 10 or perform an update.
DISM Decrypt ESD TO ISO
ESD files are compressed and encrypted versions of WIM files and need to be decrypted before you can view and use the content within. Unlike ISO files, Windows does not natively support ESD files, and thus cannot be mounted.A few methods are using which you can convert an ESD file into an ISO file so that they could be used easily.
If you're an IT pro responsible for deploying Windows in your organization, you can use the Windows Assessment and Deployment Kit (ADK) to decompress and decrypt that image, turning it into an ISO file using Microsoft-approved tools. A blog post by Microsoft MVP Johan Arwidmark contains detailed instructions on this technique.
At first, your understanding is correct, ESD files of windows insider version are encrypted, when Windows 10 downloads an ESD file with Windows Update, before installing it, system needs to decrypt it.
You have asked basically the same thing in several threads. Since MS has changed the encryption key you cannot do this. Above and beyond that there is no command prompt command to decrypt an ESD.
Because the ISO based on ESD intead of WIM is more compressed and encrypted to save space, Windows needs to do more decompressing and decrypting when using it. The difference is not significant but to give you an example, installing Windows 10 to a Hyper-V virtual machine took using the 32 bit Build 10041 ESD based ISO (#2 in above list) 15 minutes (from boot to first Settings dialog after the installation), and using the same Windows version but a WIM based ISO file (#1 in above list) 12:35. Both virtual machines had exactly the same settings, the virtual hard disks were created on the same drive on host, and the host was not used for anything else during the installation.
wimlib can also be used to handle ESD (Electronic Software Download) (.esd)archives in addition to WIM (.wim) archives. ESD archives are WIM archives thatuse solid-mode LZMS compression, and so usually have a significantly smallersize than regular WIM archives. However, Microsoft sometimes distributes ESDarchives in (partially) encrypted form. wimlib cannot decrypt such archives byitself.
In this guide, I will show you how to decrypt an ESD file and convert it into an ISO image using the ESD Decrypter (Freeware), because it is one of the very few tools that can complete this task (the other one that I've found is an application that only runs on Windows 8.1 with Update 1 and Windows 10).
Note that only decrypted ESD format is supported, meaning only that you allow Media Creation Tool to do its work and prepare the ISO, then you can convert it with NTLite to the editable standard WIM format.
Note: The nature of dealing with an encrypted file makes the tool useful as long you're using the correct RSA key to do the decryption. While the RSA key comes integrated in the ESD Decrypter tool, Microsoft can begin to ship a new version of Windows with a different key at any time, which can make the tool unusable unless you provide a new key.
Microsoft uses the ESD (Electronic Software Download) image file format to supply Windows upgrades, updates, and other components. For instance, Microsoft lets developers download the latest Windows 10 builds in the ESD format. The developers can then use them to install or upgrade Windows. The ESD image files are very compressed and encrypted. As such, you cannot open them or use them as regular ISO files. Before you can do anything, you need to decrypt and extract the contents.
ESD Toolkit is a free and portable command-line tool, though, it does everything for you automatically, e.g. decryption, extraction, and conversion. All you have to do is point it towards the ESD file and select an option. 2ff7e9595c
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