How a Computer Works
beginner 25 min 3 tasks
The parts of a computer that matter for security: the operating system, files and folders, users and permissions.
By the end of this lesson you can describe what an operating system does, explain files and folders and what a "path" is, explain what a user account is, and explain why permissions decide who can read or change a file.
You do not need to know how a computer works inside. This lesson gives you a simple mental picture, the one security people use every day.
Part of these paths
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Updated 2026-11-01