0x800703ED Error During Unattended Windows 7 Installation
When installing Windows 7 using an answer file you may receive an error that says, “Windows could not assign a volume to a partition on disk 0. The error occurred while applying the unattend answer file’s <DiskConfiguration> setting. Error code 0x800703ED.”
In the answer file I did not have the format (NTFS) selected for the second partition.