I bought this product thinking it would be genuine and work as expected. The seller is NOT GIVING TECH SUPPORT, the computer crashes every 15 minutes (photo sent of Win10 Sad Face), missing WiFi that was advertised, the computer rebooted today, and the screen states, "No Drive Present, press F1 to continue, F2 to restart," going back and forth for a week now.Finally got windows 10 to loan, used an external drive to move data, and LOST IT! DEALER IS STILL NOT CARING!Then, based on Dell's Spec's on the website, a DELL OPTIPLEX ALLOW FOR MULTIPLE DRIVES, and the seller states it does not!Do not buy unless you get the Windows 10 USB, the WiFi card, or USB he states, and then try it before you pay for it! I am arguing with both Amazon and the retailer and when he doesn't like a statement, he states, IT WAS FULFILLED BY AMAZON!.