https://github.com/theznerd/LenovoBIOStoUEFI

“Lenovo BIOS to UEFI TS Converter with CG/DG Prep: Allows you to configure SecureBoot/UEFI settings, as well as Virtualization Technology and TPM for Credential Guard and Device Guard. This script is designed to work on both ThinkPad and ThinkCentre machines. This script connects to the WMI instances for Lenovo machines, and then configures the requested settings. This script is designed to be used as part of a task sequence where you want to convert from legacy BIOS to UEFI and at the same time prepare the machine for Credential Guard and Device Guard.”