Question Aorus B450 won't boot after Initial Windows 11 Install

Sep 30, 2024
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After getting TPM enabled, and some other changes I don't remember, I got windows 11 to do it's initial install. When it tried to do it's first reboot, it wouldn't boot. Part of the problem might be that CSM is enabled, and it shouldn't be. I confirmed by loading a command prompt that the drive is formatted with GPT, so CSM should disable. But it won't disable; any time I try it reverts upon reboot.
I tried to update the BIOS using the instructions here, but it reports "Invalid BIOS Image" when I select the drive/file.
I reset the BIOS by pulling the battery, no change.

Aorus B450 Pro Wifi.