How to enter a key to upgrade to Windows 8?

If you have a genuine window 8 Key, the first thing you should think of is to upgrade your system, but you go to the official website to find "How to upgrade to Windows using only one product key" 8How to use only one product key to upgrade to the content of Windows 8  (see the link below), and upgrade according to its method, you will find a problem, the Key you have is not used, because the next operation will Let you spend 248 yuan to upgrade the professional version.
http://windows.microsoft.com/zh-CN/windows-8/upgrade-product-key-only
The following steps are to take the Key to upgrade the window 8 system according to the operation of the official website.
Step 1: Install the upgrade assistant as required.

Step 2: will let you choose the file to keep, it is recommended to choose the second one.

Step 3: Depressed, let you spend 248 yuan to buy Key, there is no page to enter Key.





























I have asked some people for the first time. It is a Chinese version, and it is in English, so he asked to try to change the language of the page to English, and then download the upgrade assistant for that page, and the miracle appeared, the English version can be upgraded. The English version of the address is detailed in the following link: http://windows.microsoft.com/en-AU/windows-8/upgrade-product-key-only
After downloading the upgrade assistant in English, the upgrade steps For:
Open the English version of the web page to download the 5.18M upgrade file as detailed below:

First step: First, there will be a page for you to enter the Key, and wait for what to enter Key.

Step 2: You will check your Key and let you wait for a while, the following screen appears.

Step 3: According to the Key you entered, judge what version of the system you upgraded. My version is Professional.

Step 4: Download window 8, online, calculate the time you spend according to the speed of the network, my 90 minutes or so.

Step 5: After the online upgrade is completed, the prompt will restart the system multiple times. You don't care about it, let it install itself, and finally wait for the new system. If your steps are here, congratulations on upgrading window 8 is successful, hurry to experience the super cool function of window8, window 8 is looking forward to your joining.
Ps: The Chinese version does not support the input serial number. The reason may be that Microsoft is fighting against piracy. Some people buy the serial number on Taobao. If I upgrade directly according to what I said, follow the black screen or something, I am not responsible for it. My idea is to support genuine.