my windows 7 is genuine, but when I tried to start double with windows xp it says windows7 is not authentic... Help, please.

I am using windows 7 ultimate.i tried using Windows 7 and xp dualboot but the xp installation was unsuccessful and when I connected the win 7, it says "copy of windows is not genuine" Please help me.

Your BIOS SLIC table seems to be missing - for which version and edition of Windows is the licensed computer, according to the COA sticker on the case (or inside the battery compartment)?

You can change to the key on the COA sticker (if that's the same edition) using the link at the bottom of the system page properties: follow the instructions.

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