Check that you have Secure Boot on, and BIOS set to UEFI with GPT boot drive.
Although not supported by Dell, I would like to install Windows 11, while TPM 2.0 is a must. In my R7 bios I see TPM is disabled and greyed out. I searched in the community and found some suggestion to turn off PTT and turn on TPM since there's a conflict. But there's no PTT at all. How to fix it?
Aurora R7, Windows 11, Bios TPM greyed out