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Windows 8.1 Single Language
How to Perform a Clean Install of Windows 8.1
Windows 8.1 is a free upgrade for all Windows 8 users, but Windows 8.1 is usually not able to install Windows 8 product keys. Fortunately, if you really want a fresh install of Windows 8.1, you can bypass this limitation.
Microsoft also only allows you to download Windows 8.1 installation media with a Windows 8.1 key, so we will show you another trick that allows you to download the Windows 8.1 installation media with a valid Windows 8 key.
Update! Microsoft Makes it Easier
If you only want to download the installation media to reinstall Windows 8.1, Microsoft offers a new option that allows you to download the image without having to enter the product key. Windows 8.1 Standard Key If you completely reinstall your Windows 8.0 PC, you can use this 8.1 installation media with the same key in Windows 8.0, so there is no reason not to do so. It is even integrated with Update 1.
Just download the Windows Installer Media Creation Tool, then select the details of the version you want (Windows 8.1 or 8.1 Pro, etc.) and follow the wizard to create boot media.
You can choose to place the boot media directly on the USB drive, or you can create the ISO for later use or burn it later to a CD.
The Problem and How We Solved it (Old Version)
The problem is that the Windows 8.1 product key is different from the Windows 8 product key. You cannot enter the Windows 8 product key into the Windows 8.1 setup just as you cannot enter the Windows 7 product key into the Windows 8 setup. You also cannot use the Windows 8.1 product key to install the original version of Windows 8.
This is usually justified, but Windows 8.1 is not really a Windows version. This is a free upgrade for every Windows 8 user, so there is absolutely no reason to introduce a new product key system.
Microsoft wants you to install Windows 8 normally and use the Windows 8.1 upgrade product in Windows Store to get Windows 8.1. Only users who purchase Windows 8.1 can install it, not the original user who purchased Windows 8.
In any case, this is theory. In fact, we can get around this limitation. The Windows 8.1 installer refuses to accept the Windows 8 product key and does not allow us to use it to install Windows 8.1. However, if you enter the Windows 8 product key on your desktop after installing Windows 8.1, Windows 8.1 will accept the Windows 8 product key – no, we don’t know why it works this way. Windows 8.1 Standard Key If we have a way to skip the product key prompt during installation and enter the key later, we can install Windows 8.1 – fortunately we do have a way to do it. We only need to modify the Windows 8.1 installation media.
Update: We have learned that during the Windows 8.1 installation process, simply entering a KMS client installation key from the Microsoft website will allow you to properly install Windows 8.1. After that, you should be able to change the key from the desktop to the original Windows 8 key.
The second problem is that Microsoft only allows you to use the Windows 8.1 product key to download the Windows 8.1 installation media. You cannot download using the Windows 8 product key normally. Fortunately, we can use another confusing technique to solve Microsoft’s limitations.
First, just visit the product key page to upgrade Windows. Click the Install Windows 8 button to start downloading the Windows 8 installation media. Run the downloaded tool and enter your product key. After the download starts, close the installation tool.
Next, just visit the product key page to upgrade Windows. Click the Install Windows 8.1 button and run the downloaded tool. The Windows 8.1 installation tool will not prompt you for a key, but will download Windows 8.1 normally. Select the “Install by creating media” option when done and create a USB installation media or ISO file. We assume that you are creating USB installation media for this process because this is the easiest way to do this.
Modify the Windows 8.1 Installation Media
If you try to install Windows 8.1 using the media you created and the Windows 8 product key, you see an error message. Instead, we need to modify the installation media before starting the installation process.
This is easiest if you create a USB installation media because you can edit files directly on a USB flash drive. If you create an ISO file, you must modify the file before you burn it to a disc.
Open the USB drive in Windows Explorer or File Explorer and navigate to the source folder. Right-click inside the sources folder to create a new text file and name it ei.cfg. Windows 8.1 Standard Key (Make sure it is named ei.cfg instead of ei.cfg.txt – this may need to ensure that the file extension is displayed.)
Open the ei.cfg file in Notepad or another text editor. Copy and paste the following text into a text file and save it.
If you have a product key for the Professional version of Windows, replace the word Core with Professional.
Install Windows 8.1 Normally and Enter Your Product Key
You can now properly install Windows 8.1 using the installation media you created. You are not prompted to enter the product key at installation. After the installation process is complete, you will see the product key prompt. You can enter your Windows 8 product key here, and for some reason, Windows 8.1 will accept it.
The new Windows 8.1 system is now installed with only the Windows 8 product key. The installation media that you create can be used to install Windows 8.1 on other systems that have a Windows 8 product key, so you can install Windows 8.1 more quickly on multiple computers.
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