Looks like I won't be getting Windows 11

User Support Hub Hardware & Peripherals
44

The issue is booting the PC if Windows is installed on the SSD and your motherboard is using UEFI mode for power up and trying to boot from it.

https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/windows-setup-installing-using-the-mbr-or-gpt-partition-style?view=windows-11

"When installing Windows on UEFI-based PCs using Windows Setup, your hard drive partition style must be set up to support either UEFI mode or legacy BIOS-compatibility mode.

For example, if you receive the error message: Windows cannot be installed to this disk. The selected disk is not of the GPT partition style, it’s because your PC is booted in UEFI mode, but your hard drive is not configured for UEFI mode. You’ve got a few options:

  1. Reboot the PC in legacy BIOS-compatibility mode. This option lets you keep the existing partition style. For more info, see Boot to UEFI Mode or Legacy BIOS mode.
  2. Configure your drive for UEFI by using the GPT partition style. This option lets you use the PC’s UEFI firmware features.You can preserve your data and convert the drive using the MBR2GPT tool, or you can choose to reformat the drive using the instructions below. Reformatting will erase all the data on the drive.

Why you should convert your drive

Many PCs now include the ability to use the UEFI version of BIOS, which can speed up boot and shutdown times and can provide additional security advantages. To boot your PC in UEFI mode, you’ll need to use a drive formatted using the GPT drive format."

Secure Boot

https://support.microsoft.com/en-us/windows/windows-11-and-secure-boot-a8ff1202-c0d9-42f5-940f-843abef64fad

“While the requirement to upgrade a Windows 10 device to Windows 11 is only that the PC be Secure Boot capable by having UEFI/BIOS enabled, you may also consider enabling or turning Secure Boot on for better security.”

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