Part 1:Every screw in this computer was either stripped and/or threaded wrong. I can't do anything with this pc if I can't get in it. Put more care in your refurbishment, don't make it so YOU are the last one in the computer and not the customer. I Will NOT buy again.Part 2:Seller had complete understanding and shipped an immediate replacement; same day as my request.Thank you, your excellent customer service has turned this entire situation around for me.Part 3:Package arrived promptly and I was able to get to the ram. Thank you.  I will definitely buy again.