How to Install Windows 10 or 11 from Scratch (Clean Install)

A clean installation of Windows 10 or 11 is ideal for:

• Replacing an outdated system (like Windows 7 or 8)

• Fixing performance issues or malware

• Starting fresh on a new or formatted PC

Follow the steps below to perform a clean install using official Microsoft tools.

What You’ll Need:

• A clean USB flash drive (minimum 8 GB)

• A working PC to create the installer

• Your Windows license key (from your email or account)

Step-by-Step Guide

Step 1: Download the Media Creation Tool

Go to the official Microsoft website and download the Media Creation tool.

Windows 10: https://www.microsoft.com/en-us/software-download/windows10
Windows 11: https://www.microsoft.com/en-us/software-download/windows11

Run the tool and accept the license terms.

Step 2: Create a Bootable USB Drive

Choose “Create installation media (USB flash drive)”, then follow the prompts.

• Select the correct edition (Windows 10 or 11)

• Choose your language and architecture (64-bit is recommended)

• Insert your USB drive and let the tool create the installer

Step 3: Boot From the USB Drive

Once created:

1. Insert the USB drive into the PC you want to install Windows on

2. Restart the PC and enter the BIOS/boot menu (usually F12, DEL, or ESC during startup)

3. Select the USB drive to boot from it

During setup:

• Choose “Custom Installation”

• Format the primary partition (if needed)

• Proceed with installation

Activation Tip:

You can enter your Windows product key during setup, or skip and activate later under:
Settings > System > Activation > Change product key