I want to test an unattended installation rtm microsoft windows 8.1, but I answer files indicate partition error this is my unattended file Now what is not, if virtualbox and VMware support UEFI / gtp for the installation of windows 8.1 x64 I worked from diskpart creating and deleting partitions on gpt fast becoming the hdd and nothing tells me that windows can not be installed because it is gpt partition, I can install in legacy mode but the idea is that, to create the unattended file for windows ADK'm using 8.1 on a 8.1 x64 Windows machine single language NOTE: I have followed the tutorials and demos from microsoft for creating unattended files UEFI / gpt to install with windows also not optimal results Failed to create a partition on disk 0 <DiskConfiguration> error code 0x80042565 any help you can give me to solve this problem is grateful now Thanks BAD RULE To be able to post links or images your post count must be 20 or greater. You currently have 16 posts. Please remove links from your message, then you will be able to submit your post. sorry will not let me put links, delete the answer file for three xxx www