---
title: "Discussion on \"Unit 6: What Happens When You Turn On Your Computer? | From Power Button to OS Explained\" | Hashnode"
description: "Discussion on \"Unit 6: What Happens When You Turn On Your Computer? | From Power Button to OS Explained\". A complete step-by-step guide to what happens inside your computer when you turn it on from BIOS/UEFI to POST, bootloaders, and the kernel. Simplified for"
url: "https://hashnode.com/posts/unit-6-what-happens-when-you-turn-on-your-computer-from-power-button-to-os-explained/6901a5f06d33f533694083f2"
---

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# [Unit 6: What Happens When You Turn On Your Computer? | From Power Button to OS Explained](https://shivarajtaware.hashnode.dev/unit-6-what-happens-when-you-turn-on-your-computer-from-power-button-to-os-explained?utm_source=hashnode&utm_medium=feed)

A complete step-by-step guide to what happens inside your computer when you turn it on from BIOS/UEFI to POST, bootloaders, and the kernel. Simplified for

Oct 29, 2025 · 5 min read · shivarajtaware.hashnode.dev  
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## Written by

[Shivraj S. Taware](https://hashnode.com/@shivarajtaware)

@shivarajtaware · India

  
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Code. Break. Fix. Repeat.

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