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Dell XPS 12 2 A08 BIOS UPDATE

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Ever since I updated to A08, when booting up, it tells me, my power adapter is not correct. I have 4 adapters, 2 from a latitude 630 with a adapter cable from Dell, one from a new latitude with a adapter cable, and the one that came with the computer. It is the only one that does not give me the error message.  

The computer worked fine with all of them till the update. Now it tells me those 3 will not work correctly.

Is there anyway to remove the latest BIOS update, and go back to A07?


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