1.    25 Mar 2016 #1
    Join Date : Mar 2016
    Posts : 1
    Windows 10 Pro

    Why is the ISO size different for Tech bench and MCT?

    I downloaded Windows 10 64bit International English from techbench and the size is 4.09GB
    In both cases I selected Windows 10(not home or pro or single language or n or kn just Windows 10)
    Language:British English(english international)
    I created same iso using MCT and size is 3.38 GB.
    Why is there such a size difference?
    I compared the two iso using Winmerge and these difference showed up::

    Click image for larger version. 

Name:	2016-03-26.png 
Views:	5 
Size:	129.1 KB 
ID:	71475Click image for larger version. 

Name:	2016-03-26 (1).png 
Views:	4 
Size:	118.2 KB 
ID:	71476

    Left: iso from techbench
    Right: iso from MCT

    The difference: 1) In sources folder techbench has Install.wim which is 3.59 GB while MCT has Install.ESD which is 2.87 GB

    2)In sources folder techbench Boot.wim is 274,678 KB while MCT Boot.wim is 274,627 KB
    3)In sources folder techbench iso has no ws.dat file while MCT has ws.dat file.
    4)In root folder techbench iso has no MediaMeta.xml file while MCT iso contains it.

    Download location for Techbench iso:https://www.microsoft.com/en-us/soft...load/techbench
    Download location for MCT: https://www.microsoft.com/en-us/soft...load/windows10
    Last edited by avg; 26 Mar 2016 at 00:21.
      My System SpecsSystem Spec

  2.    26 Mar 2016 #2
    Join Date : Dec 2015
    Posts : 2,092

    Install.esd is a more compressed version than install.wim.

    There is no difference although one may have more recent updates than the other included. Makes no difference as install updates quickly to latest version.
      My System SpecsSystem Spec

  3.    27 Mar 2016 #3
    Join Date : Dec 2013
    Portsmouth Hampshire
    Posts : 1,130
    Windows 10 x86 14383 Insider Pro and Core 10240

    Hi AVG, welcome to Tenforums. Since you are obviously inquisitive, you may wish to look inside the .wim and .esd files to see why they vary. You can do this with the latest version of 7-Zip:


    You can even use the 2-panel view to compare the two side by side.
      My System SpecsSystem Spec


Similar Threads
Thread Forum
Asus Real Bench
Be interested to see others scores :) 63351
PC Custom Builds and Overclocking
Solved Hard drive cluster size issues? Size on HDD over twice the actual size
I went to SSDs on all of my computers some time back, but I still use WD RE4s and 2.5 inch WD Black HDDs for a variety of backup tasks and for storage in which the data will not be accessed for a period longer than is ideal to use a non-powered SSD...
Performance & Maintenance
SHA1 / MD5 hashes for Tech Bench ISOs
Hi guys, I've been having unusual difficulty in downloading a good Windows 10 ISO from Microsoft Tech Bench. I must have tried four or five times, only for the download to apparently complete well short of its correct size, or for it to complete...
Installation and Setup
Tech Bench Windows 8 et 8.1 ?
Hello Is there ISO Tech Bench for Windows 8 and 8.1 and for Windows 10 to use DSIM / source? Thank you. Best regards.
Performance & Maintenance
Windows 10 Tech Bench Upgrade Program
For those of you who work on computers for a living. {option one) http://www.tenforums.com/tutorials/9230-windows-10-iso-download.html
General Support
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 11:13.
Find Us
Twitter Facebook Google+

Windows 10 Forums