Why you cannot operate a computer without computer software?

A computer needs instructions to perform a task.

There are many aspects of a computer, such as all the internal parts, the peripherals, and the software components. A computer needs hardware to store and process information, and needs software instructions to do anything for us. If there was no software at all on a computer it would merely be a box of parts. There would be no software telling the computer to show information on the output, and no software to accept instructions from the input.