I needed a new computer as mine was old and outdated. This was a great price for a refurbished unit, so I took a chance with it. Overall, it is a lot better than my old one, but it does have a problem with the USB controller. I keep getting a windows error of an Unknown USB Device (Device Descriptor Request Failed) and have not been able to clear it. I did a Google search for the error and tried to troubleshoot based on several suggestions, but none fixed the problem. The error keeps appearing, even if I disconnect all USB devices. My last resort is buying new USB controller board and see if that fix the problem. I would have returned it for a replacement or refund, but I already transferred all my files and programs and rather not waste more of my time.