With almost all Window's computers come two specific programs you can use to help keep the system in order. They are called Disk Defragment and Disk Cleanup. What they do is clean up old compressed files, clean out your recycle bin, and clear most of the computer cache. This can help speed up your system by taking off not needed files.
A program or an application or a utility are computer software that perform tasks
Worm
Software refers to the program s, or applications, that a computer uses to complete tasks.
A computer is an electronic (or electromechanical) device that can handle input, processing and produce output. A computer program is a set of rules or instructions that enables the computer to perform these tasks (input, processing and output). They work together, a computer is useless without a computer program, and a computer program cannot work without a computer. It is a symbiotic relationship.
It is the visual friendly program that performs interaction between human and computer. It allows to manipulate with hidden computer processes without deep knowledge in programming.
Software
a computer program
POST(power on self test)
At present time only a massively parallel super computer can give you that speed.
The BIOS (Basic Input Output System) is the first low level program that is loaded into the computer memory. This program performs initial hardware diagnostics memory, disk, I/O, video, etc., and then transfers to a boot program usually located on a hard disk.
The answer you are looking for is either 'script', or 'code' if you want to be more general
programming