I purchased my computer in July 2018 and exactly one year later it will not turn on.  I contacted Amazon, who told me to contact Dell.  Dell said that they needed an Express Service tag number which had been removed from the computer by Rounded Sam- the certified refurbisher I have contacted both and have still not heard back from either one.  DO NOT BUY A REFURBISHED COMPUTER FROM AMAZON OR ROUNDED SAM!!Since I wrote this review Amazon helped me with the seller and I now have a working computer.