KB21101700 Windows 10 upgrade to Windows 11

According to Microsoft, both firmware TPM (fTPM) and UEFI BIOS are required for Windows 11. You can manually enable these settings in BIOS or just update BIOS to the version that supports Windows 11.

Due to the UEFI requirement of Windows 11, operating system that is installed in CSM mode previously, will not be bootable right away with Windows 11 compatible BIOS default settings, until you do the following changes:.. read our full explanation in the HELPDESK-app.