I spent some time studying the various computer refurbishment companies which Amazon uses.  I suggest that prospective buyers study their ratings closely as there is quite a range in their positive/negative review percentages.I chose one of the top providers which markets up to 10,000 refurbished computers each month and gets very high ratings (92% plus).  I don't think this is bogus but perhaps the pandemic has put a dent in their operations.  I was sent a computer (Dell 9010) which simply didn't boot up.  "No bootable device found" error message.  Vendor support urged changing the BIOS settings and loading Windows from another computer on a USB drive.  But that's not what I wanted.  I'm not refurbishing the computer, I'm BUYING a refurbished computer.  Perhaps the description of a refurbished computer should state explicitly: "Tested before shipment and guaranteed to boot when powered on."  Didn't think that would be required but apparently it is.