This procedure is optional for Windows 10.

1. Download Windows media creation tool https://www.microsoft.com/en-us/software-download/windows10

2. Run the media creation tool

• Create installation media for another PC

• Select preferred language

• Select Edition: Windows 10 (it includes both, Pro and Home)

• Select architecture (64-bit or 32-bit)

• Select the media you want to create (USB flash drive or ISO file to create a DVD)

3. Perform a clean installation

• Boot from the USB flash drive or the DVD, then choose an operating system to start.

• Select your language, time, and keyboard preferences

• Enter the 25-digit product key

• Installation type: Custom: Install Windows only (advanced)

• Remove all partitions (this deletes all your data!) and create a new one to install Windows

From this point on, just follow the rest of the instructions. Once you complete the steps, the setup will install a fresh copy of Windows 10 on your computer.