This negative review has nothing to do with the Dell product itself. It relates to the seller's work performed with the following reasons:1. The seller did not perform the complete diagnosis of the system. My system has a non-working DVD drive and the DP ports could not send audio signals to the monitor on HDMI ports always. The audio signals will stop working after two or three reboots.2. Those issues were reported to the supplier on the 90th day after receiving the PC and the supplier refused to replace the system. They only agreed to fix the PC but the shipping charge will be on the buyer.3. From the ad picture on Amazon, this system is supposed to have Wi-Fi function, but it did not. It has only Ethernet connection to the router.