the two major methods for completing an attended installation
An end-user licensing agreement (EULA) must typically be accepted or declined, preferences like the installation location must be specified, passwords must be provided, and assistance with product activation must usually be provided by the user present during the installation process.
There are four approaches of installation
Any prior versions of the software are removed after a clean install. An upgrade, in which parts of an earlier version are kept, is an alternative to a clean install. Operating systems (OSes) and software applications are two common contexts for the phrase.
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