Just like the headline says, multiple bad units from this seller. Amazon has to step in and save me from wasting money on this junk.  Lucky I am a long-time high-volume Amazon Business Customer.  When will companies like "Craven Savings" learn to stand behind their products?  They are trying to move inferior product into the marketplace and profit off them.  NEVER AGAIN!  Noisy fans, BIOS won't update, systems restart and won't shut down.......and INTEL has signed off on warranty responsibilities.  BUYER BEWARE!