The screen froze up after just 7 months and there is no support from the seller. I can't read the serial number because some brilliant person decided putting a clear sticker with grey type on a grey computer was smart.UPDATE: It was in the shop for 4 months, wasn't repaired.  When I went to pick it up, there was an entirely new problem, the screen was completely dark.  Now Lenovo is saying they won't repair it because it is not under warranty.