This guide is for those who dares to install Windows 10 on old or slow netbooks (low end memory of e.g. 1GB OR 2GB of RAM).
Though the Windows 7/8 -> 10 upgrade program is over (officially, but it still works), you still may use old Windows product keys from license stickers to install Windows 10 on old machines.
If you want an easier automated way to speed up Windows and disable some unnecessary things, use an app like https://github.com/builtbybel/privatezilla Privatezilla is the simplest way to perform a quick privacy and security check of your Windows 10 copy.