How can I tell if a retail box of Windows 7 is genuine, especially from the Certificate of Authenticity (COA) seal? The COA has 3 barcodes: left, right, and bottom. The left one has 2 number sequences, the right one has 1, and the bottom one has none (unless it refers to the alphanumerical sequence in the center of the sticker). How can I verify these sequences?
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