BLUF

A Windows 10 bootable USB drive can save you both time and trouble should you ever need to reinstall Windows, and the app is free.

Summary

It's a good idea to have a Windows 10 boot drive. Creating the drive sounds complicated, but it isn't. All you need is a reliable internet connection, and then follow these steps:
  1. Go to this page.
  2. Scroll down to Create Windows Installation Media.
  3. Click on the Download tool now. 
  4. Double-click the file called MediaCreationToolxxxx.
  5. Select Create installation media from the list of options. 
  6. Accept Microsoft's terms and conditions.
  7. Select Create installation media for another PC.
  8. Click Next.
  9. Adjust your settings as needed. 
  10. Select:
  11. Language.
  12. Edition. 
  13. Architecture.
  14. USB flash drive
  15. Click Next. 
  16. Plug your USB drive into your computer. 
  17. Select Next.
  18. Double-check that you're selecting the proper drive for your USB thumb drive, as this process erases all existing data on the thumb drive.
  19. Click Next.
  20. Click Finish, and you now have a Windows 10 boot drive.
Following these instructions, you can also use the media tool to upgrade from Windows 7 to Windows 10.