I am selling this server, as I am replacing the equipment. It was working normally before the replacement. Please feel free to comment if you have any questions. I have been using it for about 5 years after purchasing it used. Currently, the OS is not installed, but if you wish, I can install Windows 10 Pro and provide it to you. (The license will use the one included with the main unit) When listing, I have cleaned it simply with a blower, but there may be some dust that I couldn't remove completely. Please understand that this is a used item before purchasing. When negotiating a price reduction, please use the "Price Reduction Request" button. Specifications Shape: Space-saving OS: Windows 10 Pro (Not installed) CPU: Intel Core i7 6700 Memory: 16GB (8GB x2, 2 slots empty, total 4 slots) Graphics board type: Not installed Storage type: HDD Storage capacity: ~1TB Network: 1GbE Wi-Fi, Bluetooth... None DVD drive... Yes Accessories: Power cable (2-pin with earth) only