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I am trying to enable Legacy Boot Mode OR UEFI Hybrid (With CSM) in BIOS on an EliteBook Revolve 810 G3. I have successfully updated from BIOS v 01.18 (08/08/2018) to the current latest 01.22 (02/18/2020) via the update feature within the BIOS itself.
I have successfully Set the Administrator Password in the BIOS at Security > PASSWORDS AND CREDENTIALS > Change Password. I have also Security > Set Security Level to Set All Security Levels to "Change" so that changes can be made on all.
I see the Boot Mode: Legacy Boot Mode, UEFI Hybrid (With CSM), and UEFI Native (Without CSM), but they are all grayed out. I also see SecureBoot is checked and grayed out, preventing unchecking SecureBoot. How can I enable configuration of the Boot Mode settings?
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