How do I buy a license key to activate Windows 8 Enterprise?

You can not install the 8 Pro License Product Key on two machines at the same time.

One License is for one installation at a time

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Support and downloads for 8 has ended.

Use 8.1 Pro.

You can download and create your own Windows 8.1 Installation Media to reinstall the Operating System with..

"Create installation media for Windows 8.1"

http://windows.microsoft.com/en-us/windows-8/create-reset-refresh-media

"Download Windows 8.1"

https://www.microsoft.com/en-us/software-download/windows8

A similar Tutorial which may also assist you

"Create Installation Media for Windows 8.1"

http://winsupersite.com/windows-8/create-installation-media-windows-81

In the first screen of this very simple wizard, you need to choose the following:

Language. English – en-us if you're in the United States.

Edition. Windows 8.1 (Core), Windows 8.1 N, Windows 8.1 Pro, Windows 8.1 Pro N, or Windows 8.1 Single Language.

Architecture. 64-bit (x64 ) or 32-bit (x86).

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"How to Create a Bootable USB or DVD with a Windows 8 or 8.1 ISO"

http://www.eightforums.com/tutorials/2227-create-bootable-usb-dvd-windows-8-iso.html

   Warning

This will not work to install Windows 8 or 8.1 for UEFI. For that, see this tutorial below instead.

UEFI Bootable USB Flash Drive - Create in Windows

If you have activation problems, follow these steps:

"How to Activate Windows 8 and 8.1 by Phone"

http://www.eightforums.com/tutorials/24636-activate-windows-8-phone.html

You can't buy a key for the Enterprise version.  Presumably you have a license for the OS originally installed by the manufacturer, and that version can be reinstalled.  Contact the manufacturer.   Other than that, your only (legal) option is to purchase a key for whatever version you want and you PC is capable of running.

Sorry but I don't know what you mean. Are you telling me to install Windows 8.1? I can't because this windows is expired. I don't know what to do, please help me. :(

What I am saying is that there is no way for you to have a Windows 8.1 Enterprise on your machine as a private user (unless it was the trial evaluation edition for 90 days.

I explained why you could not buy a Key for it and advised you where to buy a Key:

Try Amazon.com, but buy 8.1 as support for Windows 8 has ended.

You are not using a legal copy of Windows as a private user.

Sorry but I don't know what you mean. Are you telling me to install Windows 8.1? I can't because this windows is expired. I don't know what to do, please help me. :(

Hi,

You can't buy a Windows 8 Enterprise License.

Enterprise is sold via Volume Licensing/Software Assurance and that is for Corporations who buy multiple Licensing.

Enterprise is not for private use.

Try Amazon.com, but buy 8.1 as support for Windows 8 has ended.

Cheers.