A:Answer It is a free upgrade, you just need to enable a TPM module. Rather than buy one, you can leverage your CPU to do it.
Run the Windows 11 Compatibility Check
https://www.microsoft.com/en-us/windows/windows-11#pchealthcheck
See photo attached, requiring to enable a TPM 2.0
This has to be enabled in the bios, see the following article:
https://support.microsoft.com/en-us/windows/enable-tpm-2-0-on-your-pc-1fd5a332-360d-4f46-a1e7-ae6b0c90645c
This PC has an ASROCK 590c/AC, so see the following:
https://windowsreport.com/enable-tpm-bios-asrock/