Examples are: "I kept updating the free version, but I decided to upgrade to the premium version." "Microsoft kept updating Windows 7 but I finally upgraded to Windows 8." See edit and upgradable.In computers, an upgrade is a new version of or addition to a hardware or, more often, software product that is already installed or in use.Please enable Cookies on your browser and try again. Although meant to fix problems, poorly designed patches can sometimes introduce new problems (see software regressions).ISSU was initially introduced by Cisco Systems for updating and upgrading their suite of networking devices.For the ISSU to work, the networking/equipment must have a redundant route processor (RP) within its core architecture.
"Update" is also used to change the source code of software.This way, when updating, the upgrade process can be mapped onto a parallel RP and the routine operations/services can be performed from another RP.For example, some Cisco routers and switches are integrated with active and standby route processors.In some special cases updates may knowingly break the functionality, for instance, by removing components for which the update provider is no longer licensed or disabling a device.