A system upgrade refers to the process of improving or enhancing a computer system, software, or hardware to a newer version. This can involve installing updates, adding new features, or replacing outdated components to improve performance, security, and functionality. Upgrades can be essential for maintaining compatibility with other systems and ensuring that users have access to the latest tools and technologies. Common examples include upgrading operating systems like Windows or macOS, as well as software applications such as Microsoft Office or Adobe Creative Suite.