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What is the difference in “Boot with BIOS” and “Boot with UEFI”

I keep hearing about Windows8 now supporting UEFI. Can someone explain concisely what it means and how it is different from the traditional BIOS?


UEFI is similar to an OS like BIOS but is not tied to any architecture. Also, UEFI is an interface and can be implemented on top of a BIOS.

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