Difference between Windows 8, Windows 8 Pro, Windows RT and Windows 8 Enterprise
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Windows 8.1 - Wikipedia
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Surface Pro 8 – The most powerful Pro – Microsoft Surface
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Windows 8 - Wikipedia
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Microsoft confirms Surface with Windows 8 Pro pricing: starting at $899 for 64GB version, shipping in January | Engadget
Download Windows 8.1 Disc Image (ISO File)
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Microsoft Surface with Windows 8 Pro: Hotter, Thicker, Faster, Louder | Ars Technica
