Hi Chard, I’m sorry to hear you’re having issues with this. I understand what you mean, as all the products you mentioned are large files.
It seems you might not be downloading the full file. I recommend download one file at a time and make sure it has fully downloaded before either downloading another one or trying to extract/open the file to your computer.
Another option is to download a software that allows you to download small chunks at a time. These types of software are helpful if your download cuts out half way and instead of downloading the entire file again, it will start back where it last left off, sought of like an FTP application.
I hope this has helped.
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