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Home » Windows OS » Install Windows 8.1 without key on a Windows 8 PC

Install Windows 8.1 without key on a Windows 8 PC

August 4, 2014

An important note before we install Windows 8.1 in this post, I must first say, that you will need valid Windows 8.1 license key to activate your OS once it’s already installed. I do this on a Windows 8 machine.

I am using Windows 8 Professional in this post. I am not sure if this will work with other versions, as I haven’t tried it yet. But I guess it will.

I am also using an .iso file as I already have it (if you haven’t read further), and alternatively, you can use a bootable USB drive.

Why should we install Windows 8.1 without key?

We shouldn’t if we want to install it on one computer.

But if you have license key for multiple computers, and you need to install them in your company’s computers for example, you might want to use this method to skip entering keys on each installation, and activate them once they’re installed.

Steps to install Windows 8.1 without license key

Regarding the video above (It’s not mine, mine was deleted because of Microsoft’s copyright..), I recommend to download the Windows files from Microsoft official website, rather than torrent or anywhere else.

Make sure you have the backup of your computer and important files.

1. You need to have the Windows 8.1 files. In this video, I have them already in .iso file format called, Windows81.iso.

If you don’t have these files yet, you can download from the official website, following this tutorial. (Follow all the steps, until you have the “Install by creating media” option in step 7. (you can choose other option too).

In the video of that post, watch until 3:07 minutes.

2. Create a new folder, I called mine, as “WindowsFiles”.

The new folder and Windows 8.1 files in .iso format
The new folder and Windows 8.1 files in .iso format

Double click the .iso file to mount, and you will see the file’s content. Copy all of the contents to WindowsFiles folder.

If for some reasons, you can’t mount it, copy the file to Local Disc (C) folders and you will be able to do this.

3. Open “Sources” folder. Create a new text file, called, ei.cfg.txt

Sources folder
“Sources” folder

4. Double click this ei.cfg.txt file (by default, it will be opened in notepad, see this if you want to open hosts file with notepad)

Content of ei.cfg file
Content of ei.cfg file

Then type these following:

[EditionID]
Professional

[channel]
Retail

[VL]
0

For EditionID, change “Professional” accordingly to your current Windows 8. Mine is the Pro version, so I typed that. Core for Home Premium, Enterprise for Enterprise version.

Channel, enter Retail or Volume, depending your License key’s type.

VL 0 or 1.

5. Rename or delete the .txt extension of ei.cfg.txt. So you will have a file, called, ei.cfg inside your “Sources” folder.

The ei.cfg inside "Sources" folder
The ei.cfg inside “Sources” folder

6. Next step, go to the folder and double click setup.exe file by double clicking it to install Windows 8.1 on your computer.

Setup exe file
Double click this setup.exe file

7. Follow the instruction until you can click on “Skip” when the “Product Key” prompt screen appears.

Install Windows 8.1 without product key
Option to skip – Install Windows 8.1 without product key

8. Once it is installed, you will need to activate it.

Type, “slui” in search box of your charm bar, and click “Enter” key.

Type "slui" then enter
Type “slui” then enter

It will show you the activation dialog box, where you can enter your valid license key.

Activate Windows 8.1
Activate Windows 8.1

That’s it, now you can spare the hassles to always enter your product key on installation process.

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Topics: windows 8.1

About Kimi

Called, PC or Computer girl at home, want to share her knowledge and experience worldwide.

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  1. Downgrading Windows 8 to Windows 7 on Dell Inspiron 15 3531 says:
    August 10, 2014 at 8:01 am

    […] you do this, you should have backup your laptop, if in case you want to install Windows 8.1 OS back. This means, everything in your laptop will be gone or all wiped after Windows 7 […]

  2. Disable Charms Bar Pops Up Windows 8.1 says:
    September 13, 2014 at 7:51 am

    […] I tried Windows 8 after beta installation for the first time, the one feature that I really liked was the charms bar on the right area of […]

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