I need a tutorial of Windows 10 clean installation

Performing a clean installation of Windows 10 can help resolve issues, improve system performance, and give you a fresh start. What You’ll Need:

• A Windows 10 product key (if you don't already have it, you may need to buy one).
• A USB flash drive with at least 8GB of free space (this will be used to create the installation media).
• A backup of your data, as a clean installation will erase everything on the selected drive.

A clean installation will erase all data on the chosen partition, including applications, settings, and files. And a stable internet connection is recommended during the installation and update process.