I bought this as an open box, Pawn shop on Ebay, he says it was sold to him that way, never used, Very clean machine. I have been using it for 2 weeks testing it to see if I should return, all tests ok for system, seems to run well - ELite book I5,256 SSD, 16 GB ram, crystal disk info show 75 power on counts, Reads 571 Gb, writes 688 Gb , return or keep?