I wanted to upgrade my Proxmox Windows 10 guest VMs to Windows 11. Some of the guest were originally created with BIOS and couldn’t be upgraded to Windows 11 without UEFI. So in order to upgrade them I would have to convert the Proxmox Windows 10 VMs from BIOS to UEFI. Prerequisites Before you begin, … Continue reading How to Convert a Proxmox Windows Guest from BIOS to UEFI