Final answer:
Partitions and file systems are configured on a disk to make storage space available to the Windows OS.
Step-by-step explanation:
On a disk, the two things that need to be configured to make storage space available to the Windows OS are partitions and file systems. Partitions and file systems are configured on a disk to make storage space available to the Windows OS.
A partition divides the storage space on the disk into separate sections, allowing for the organization and allocation of files and directories.
A file system is the method used to structure and store data on the partition. It provides a way for the operating system to locate, retrieve, and update files stored on the disk.