Download the Windows 10 Refresh Tool from Microsoft’s site.How to use the Windows 10 Refresh Windows tool To carry out a clean install of Windows 10 with the Refresh tool, you won’t need any external media, or access to any apps other than your own PC and a web browser. In the rare cases where you don’t have access to one of these drives, or for some reason have borked up your Windows install so bad you can only access the browser - Microsoft offers an alternative tool. With the Windows Media Creation Tool, it’s easy to download and install a fresh build on Windows on your current hardware supposing you have access to an external media drive.
Microsoft offers many tools to clean-install your Windows PC and clean it of junkware.