Backup Important Data (if reinstalling).
Prepare Bootable USB Drive:
Use tools like Rufus, Windows Media Creation Tool.
Download Windows ISO from Microsoft Official Website.
Check System Requirements for Windows version (e.g., Windows 11 needs TPM 2.0, Secure Boot).
Restart PC.
Enter BIOS/UEFI (usually by pressing F2, F10, DEL, ESC at boot).
Set USB Drive as First Boot Device.
Save and Exit.
Insert USB/DVD and boot from it.
Choose Language, Time, Keyboard settings.
Click Install Now.
Enter Product Key (or click Skip/Do this later).
Choose Windows Edition (if applicable).
Accept License Terms.
Select Custom (Advanced) for clean installation.
Select Drive/Partition to install Windows:
Format partition (optional for clean install).
Create new partition if needed.
✅ Installation begins and PC will reboot automatically when done.
Use Windows Deployment Services (WDS) or SCCM for corporate bulk installation.
Use Sysprep for creating Windows images.