Migrating a Windows 10 VM to Windows 11 in Parallels Desktop: a story of TPM chips and BIOS upgrades

This weekend assignment was to upgrade a couple of old Windows 10 VMs to Windows 11 in Parallels Desktop 17. I couldn’t do that right away because Windows Update was complaining about the lack of the TPM chip. A little research revealed that TPM chips only work on UEFI BIOS. To check which BIOS version was being used in my VMs, I used the msinfo32 (System Information) application. It showed the BIOS to be of “Legacy” type. »