To be eligible for this upgrade you must buy a PC with Windows 7 preinstalled on it (systems running Windows 7 Starter Edition are not eligible for the upgrade) between June 2, 2012 and January 31, 2013.

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Once, before dual voltage became the standard for consumer electronics, there was plentiful physical evidence of the fact that if you plug in across systems without a transformer, the result is either a flame-out or a non-starter.

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