Final answer:
Disk Cleanup is a Windows 10 utility program that helps users remove unused files and applications to free up disk space and improve system performance.
Step-by-step explanation:
The utility program included with Windows 10 that eliminates unused files and applications is called Disc Cleanup. This tool is designed to help users free up space on their hard drive by scanning for and removing files that are no longer needed or that can be safely deleted, such as temporary files, system cache, and the recycle bin. Moreover, Disk Cleanup can also be used to uninstall programs that are not in use, contributing to a more efficient and faster operating system.