In this post I will show you have to create 3 steps in your task sequence that checks if the computer is running UEFI. This is useful if you are installing Windows 10 and want to make sure the UEFI is enabled. The check is running at the start of the task sequence, so it doesn’t format the disk if the BIOS setting is not UEFI. This means that you can boot the Pc with the old installation if the check fails. If you want to semi automate the switch from BIOS to UEFI, see this post. 1E have a fully automated process and you can get more information here. Nickolai Andersen have a blog post where he automate the switch on Dell computers. Thanks to the blog post on Garytown for the inspiration.