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Assuming that your computer support x64, just get a 64-bit installation disc from your manufaturer and install it. (Alternatively, you can download the ISO for it online and install it to a few DVDs or a flash drive)

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9y ago
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9y ago

Boot your DVD from computer startup or in WIndows and follow the instructions.

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Q: How do you install Windows 7 x64 after installing Windows 7 x86?
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