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BitLocker: Booting with USB key
I am new to bitlocker and am trying to encrypt C drive. I have already enabled USB authentication since my mainboard (P67A-UD3-B3) does not support TPM. My problem is this: in the BIOS, you obviously don't want to set the USB drive as the first boot device, correct? But if so, how can windows recognize the USB before it is even booted? I tried setting the USB as first drive in boot (USB HDD), but then windows fails to boot, which is not surprising. And when it is not set as the first device, W7 boots and I get the bitlocker error message because the USB and the encryption key were not detected.
I also read something about legacy USB support. I am not sure how to check this feature, but my guess would be that today all mainboards have that feature.
Any help would be appreciated.