Here's an instructional video guide in order to go through the clean installation process.
Installation Guide: https://www.microsoft.com/en-us/software-download/windows10startfresh
USB Installation software: https://www.microsoft.com/en-us/software-download/windows10
If you have any other questions, please do not hesitate to contact our support team.
Additional instructional videos;
How to create Windows 10 USB install drive: https://www.youtube.com/watch?v=gLfnuE1unS8
How to install Windows 10 using install USB: https://www.youtube.com/watch?v=6uRT-bWE2EQ
Insert the USB into a 2.0 USB port if available if not a 3.0 will work and restart the system, as soon as it powers up
Press F7 or F11(EVO) on boot for a notebook
Press F8 on boot for Desktops with an ASUS motherboard
Press F11 on boot for Desktops with an MSI or Asrock motherboard
Press F12 on boot for Desktops with an Gigabyte motherboard
Press ESC on boot for Desktops with an EVGA motherboard
Also, please make sure you have connected Windows 10 with a Microsoft Account.
Once you have your new system up and running, please make sure to link an existing Microsoft account to your Windows Digital key. The original method of using stickers with genuine keys has become obsolete, now the keys are digitally signed to the hardware but you can bind it to your account, in case you ever need to reactivate Windows. The link below contains the guide for adding an account and reactivating Windows.