This refurbished computer worked well for several month, then one day it wouldn't boot up, displayed a message that my computer had no operating system installed.  On further investigation, my SSD HD stopped work.  I opened up the computer case, and saw that the SATA connector that connected to my HD was defective, it had split open at one side, and caused my HD to fail.  I had to buy another HD and reinstall windows and all other software, it was a hassle.  This was outside of their warranty period so I had to pay for the replacement HD myself.