Upon receipt I transferred my computer  contents from my old computer to the Dell  refurbished Optiplex but could not get power to system. [Later discovered a corrective procedure to follow, included in shipment .] I turned the computer from it's side to flat, with access door up, and the power was restored. Seller claims this is due to shipping. I continue to get a notice to activate windows 10, but cannot get it to install.  On occasion, I lose access to the internet, and found by re-booting system, internet returns. That is my experience, I'll let you decide.