Why isn't it downloading properly?
This software has a fairly big size (around 2 Gb). For you to properly download it, it's advised to use a download manager. By doing this, you can pause the download process whenever you want without the need to start from scratch. You can use Software Informer's website to search for a program that can help you. I suggest you take a look at Free Download Manager.
your desktop or laptop does not have space to download