I bought this computer late Nov and received early Dec.  Powered up the unit and followed the set up instruction.  It went thru the part of setting up access code and the screen went blank (black) for hours.  Contacted the tech and he said possible hardware problem and suggested me to return for replacement.  Contacted Amazon and was told the replacement will not be ready until mid January.  This is too long so I returned it for refund and went on to buy another one of the same model which came in within 7 days.I was happy that the unit showed up so fast until I plug it in and tried to go finish the set up process again.  No luck, it does the same thing like the first unit (it went blank/black the same way).  Talked to tech again.  This time he said that the unit may have been loaded too long ago and needs factory reload again.  This time I am upset.  How could anybody sells/ships things out with such defects.