I wouldn't worry about it, the Dell utilities usually give an obsolete Windows 10 installation .iso which is often at End of Life by the time the end user gets around to using it. You are best to use Microsoft's Windows 10 Media Creation Tool to get the latest build of Windows 10. I give instructions on using it and clean installing Version 1803 here: [URL]  
As per Dell SupportAssist OS Recovery User’s Guide: "SupportAssist OS Recovery is available only on certain Dell Inspiron, Dell XPS, and Dell Vostro computers that run a Dell factory-installed Microsoft Windows 10 operating system." It is a recovery environment that allows someone to restore the computer back to factory state. Presumably, someone can also manually access the SupportAssist OS Recovery environment at any time. XPS 27-7760 is a supported system: [IMAGE] Unfortunately, this recovery environment is unavailable on my system, which means I cannot go back to factory state. I inquired to Technical Support, and was informed that the reason it is unavailable to me is because the system I purchased is Certified Refurbished. In addition, I was told that it would not be possible to download an image or create a USB flash drive that will install the factory version of Windows that was shipped on my device. It seems like a big deal to me. None of that information was mentioned to me at the time of the purchase. I don't understand why a refurbished system should be any different from a brand new one, in terms of available tools/software and support. Did anyone experience similar problem?
SupportAssist OS Recovery unavailable on XPS 27-7760