1st purchase 1 and it was perfect.  NO issues.  The 2nd had bad memory and had to be replaced.  Against my better judgement, I tried #3.  Will not boot.  Software not installed correctly.  Cant contact seller without Amaxon bots.  I now need to return and I have to take it to UPS myself.  DO NOT PURCHASE THESE.  ONLY 33% ARRIVE IN WORKING CONDITION.  When I notified them on the 2nd unit, I was expected to open the unit and check all connections.  NOT going to check there work on this one.  YOU SHOULD PICK UP AT MY BUSINESS AT YOUR EXPENSE.  Needed to install next week.