I have a Thinkpad laptop X230（I bought it in China）.This machine had pre-install system（win8 prc）
But I want to use win8 PRO ，So I bought a win8 pro.
The problem is during the installation error message came up
The product key entered dose not match any of the windows images available for installation. Enter a different product key.
How can I install win8 pro？？？:confused:
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