CPO Systems, or Certified Pre-Owned Systems, are computers that have gone through a typical business cycle. These were leased by an organization, or sold to a Certified Microsoft Refurbisher after an upgrade. Nightscape Tech specializes in Grade A CPO Systems. We only sell high performance and clean pre-owned systems, with the base model having an Intel Core i5, 4GB of RAM, and an SSD. These are very fast computers that will last many years.