Essential Computer Program That Can't Be Altered

This page is the CodyCross answer for the clue below from Games, Group 958, Puzzle 1 (Roguelike Dungeon Crawler).

Question is: Essential Computer Program That Can't Be Altered

and the answer is: FIRMWARE

Word Meaning:

FIRMWARE — (computing) A permanent form of software that provides a low-level control of computing device hardware.

Definitions from Wiktionary.

Essential Computer Program That Can't Be Altered - Games CodyCross Answers | CodyCross Solutions