Upgrade and installation testing

Upgrade and installation testing involves evaluating the process of installing, updating, and upgrading a product or service, as well as the process of uninstalling it. The functionality of the installation and upgrade process is tested, as well as the reliability and stability of the product or service after it has been installed or upgraded. The product or service may be tested on different devices and operating systems to ensure that it works properly in a variety of environments. The process of uninstalling the product or service is also tested to ensure that it can be easily removed from a device.