WINDOWS MEDIA CREATION TOOL
THE DAYS OF RELYING on an increasingly out-of-date installation disc are long gone. Simply download the Windows Media Creation Tool for Windows 8.1 ( www.microsoft.com/softwaredownload/windows8) or Windows 10 ( www.microsoft.com/softwaredownload/windows10), and it will walk you through the process of creating your reinstall media, either on DVD or a USB flash drive.
Better still, the Windows Media Creation Tool also downloads the latest installation files first, which means that if you reinstall Windows 10, for example, you get it with the Fall Creators Update already applied. Always create fresh media prior to reinstalling Windows, to ensure you have the latest version of the operating system.