For example, if you have a single drive in the computer and it’s completely empty, you can just type select disk 0 and then create partition primary to select the first disk and create a new partition using the entire amount of unallocated space on the drive. Select Next > on the Assign Drive Letter or Path step, assuming the default drive letter you see is OK with you. Windows cannot be installed on drive 0 unallocated space Fix unallocated USB disk with Disk Management. Windows cannot be installed on drive 0 unallocated space