Let me first state that I am unfamiliar with Core Audio, so I just went to their website to get a feeling of what they claim their music server can or can't do. I looked at the Kryptos Music server for $5,899 and some of the options offered make good sense. For example, the quiet chassis and super quiet hard drives. Any unwanted noise can contribute to a distraction in your music experience. This Kryptos Music server's specs did not specify any type of amplifier, so I'm assuming it's nothing more than a music server, with JRiver demo software installed (for this price, why they can't throw in a sub $100 software package is beyond me. I can't find anything about Core Audio that would allow them to "rebuild" Windows to minimize I/O processes - Microsoft allows programmers to link to their Core API (could that be where they got the company name?), but that isn't the same as modifying Windows, which I don't think even DELL or HP are allowed. Which makes me believe if they did mess with the Windows OS (as opposed to hooking into the API), this could very well be the reason for the crashing.
My first attempt to fix this, considering the company is refusing to honor the warranty, is to install Windows 8 and then JRiver. If the system still crashes after about an hour, I would look at replacing the RAM. After that I'd have to think something on the mother board is overheating and causing the error.