Ordered a refurbished computer with dual monitors.  First PC was put together poorly so half of the connections on the back were crooked and nothing could be plugged in.  SECOND PC worked for ONE day and then went to a blue screen that couldn't be resolved.  THIRD PC made a knocking sound followed by a whirl sound and then a couple moments of silence.  Then the knocking got louder and would gradually lessen in volume but never went away.  I returned that junk to the junkyard it came from.  Now I understand why they only want to give you a 90 day warranty.  They hope the PC works for 90 days and then after that you are stuck with their old junk.  Only chose one star because I had to!