This computer is ready to use with windows 10 Pro. It has gone through a thorough a rigorous refurbishing process as well as Quality Control Testing. We replaced any slow, low performing, failing or bad hardware including the hard drive, memory and capacitors. We have verified that all of the ports and connectors are in proper working order. We have tested functionality and performance to ensure it can perform tasks fast. SAVE TIME with the freshly installed digital product key for Windows 10 operating system. No more keying in 25 tiny, hard to see, characters or loading time to activate. It will automatically activate once the license agreement is accepted with the click of a mouse!