Match the installation type to its description.

1. what you do when you have a computer with an existing operating system that needs to be upgraded
clean installation
2. what you do when you have several operating systems on one computer
upgrade installation
3. what you do on a brand new computer that has never been set up before and does not have an operating system on it yet
multiple boot installation

Following are the types of installation matched to its respective definitions.

What you do when you have a computer with an existing operating system that needs to be upgraded.

This means that while working on a window when you get attracted by the update introduced recently and you upgrade your window accordingly.

For example: Updating a window from 8 to 10 or desired features.

What you do when you have several operating systems on one computer.

In this type of installation, a computer has different windows for different accounts. You can boot to the desired installed window by switching account.

What you do on a brand new computer that has never been set up before and does not have an operating system on it yet.

It can be defined as the installation of window done very first time on to the computer. Sometimes when the window gets deleted due to virus or any other factor, the installation at that time will also be termed as Clean Installation.