However, that’s not a huge problem, because you can easily create your own Windows 10 installation USB key as we’ll see later. You can choose to either download the update directly, or Microsoft can send you a Windows 10 USB which you can use to install it, although at the time of writing the latter option was “out of stock”. You'll have to stump up $179 for a Windows 10 Home licence or $299 for Windows 10 Pro the Microsoft Store. If you haven't yet updated your PC to Windows 10, you've sadly missed your chance to take advantage of the free upgrade. Installing a new operating system is a big change, with potential for things to go badly wrong, so don’t be tempted to skip the backup step. Although Microsoft provides a way to revert to the previous version of Windows in the first 10 days after installing the new OS, a backup image is additional protection, allowing you to roll back your PC to exactly the way it was (including all your files) before you installed Windows 10.
In addition, it could be worth using a third-party tool such as EaseUS Todo Backup Free to make an image of your computer.