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I have my laptop given to me from a Japanese friend. It has Japanese version genuine Windows 7 installed in it. I want to change the interface language to English or if possible the whole system language to English.

I want to avoid installing the english version again.

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If you have Windows 7 Home Premium, you will need to upgrade to Windows 7 Ultimate, to change whole system language (windows, menus, etc, to english). :/

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Check out the instructions here, depending on your version of Windows 7 you can use these guidelines to change your system language.

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