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Different Windows Version on same disk

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					So how to force Windows 7 setup to allow us to choose desired edition during installation?
Answer is very simple! By modifying "ei.cfg" file present in Windows 7 setup.




"ei.cfg" file is present in "Sources" directory of Windows 7 setup disc which tells the setup which
edition should be installed in system.

If you open the file in Notepad, it looks similar to following:

[EditionID]
Ultimate
[Channel]
Retail
[VL]
0

Here:

Edition ID tells Windows setup which edition should be installed.

Channel can be either OEM or Retail.

VL represents Volume License and it can be either 1 (for True) or 0 (for False).
So the simple solution is, delete "ei.cfg" file from setup and it'll ask you to choose the desired
Windows 7 version at the time of installation as shown in following screenshot:




Another solution is to modify the "ei.cfg" file and change the [EditionID] to your desired one.
You can use any of following valid "Edition IDs":

Ultimate
Professional
HomePremium
HomeBasic
Starter

So if you want to install Windows 7 Professional, simply change [EditionID] to Professional
and your custom "ei.cfg" file will look as following:

[EditionID]
Professional
[Channel]
Retail
[VL]
0
Now the question is, how to delete or modify "ei.cfg" file in Windows 7 setup?

There are 2 ways! You can extract the content of Windows 7 setup ISO file using 7-Zip and
then delete or modify "ei.cfg" file according to your requirements. Its useful if you are going to
do an upgrade because you can run setup.exe file directly from the extracted folder and install
Windows 7.

If you are going to do a clean install, you can open the ISO file using our exclusive freeware
"ISO Toolkit" and then delete or modify "ei.cfg" file and save the ISO. Now you can burn the
ISO file to DVD and install your desired Windows 7 edition.

If you have a USB drive, you can use our "A Bootable USB" tool which allows you to create
bootable USB drive for installing Windows 7.

UPDATE: You can also use a free tool "ei.cfg Removal Utility" to delete "ei.cfg" file so that
you can choose the desired version at the time of installation.

OR you can use another free tool "Windows 7 ISO Image Edition Switcher" to modify "ei.cfg"
file so that you can convert a specific Windows 7 edition setup ISO file (e.g. Windows 7
Ultimate) to another one (e.g. Windows 7 Professional).

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