I ordered two of these systems recently. My plan was to install 2GB graphics cards and wifi adapters so that my teens could use them for schoolwork as well as low-level gaming/digital art systems.Short version: One worked perfectly, but the other would not boot on arrival. If I hadn't been able to diagnose and fix the problem myself, I would have had no choice but to return.Long version: The refurbisher had used a right-angled SATA cable to connect the HDD, even though the frame clearance didn't allow for this. As a result, the cable broke in transit, and the hard drive was not connected. I had to order a replacement SATA cable, but I'm glad I did. Once I had the drive properly connected, everything worked smoothly.These are fabulous deals for the money. Both towers were pristine, with clean installs of Win 10 (no annoying extra programs pre-installed). But I recommend taking care when buying these systems, especially if you're not comfortable working with hardware.