I´m sorry to for answer in this old post Butt a warning of using this line: [unattended] Repartition = Yes .-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. - If you want Windows Setup to delete all partitions on the hard disk and to create a new partition, you must include the Repartition command in the Winnt.sif file. Under [unattended] , insert a new line, and then type the following: Repartition=Yes Ref: How to perform an unattended installation of Windows. //ZnaKeBite