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There are other installation methods like
Upgrading an operating system
Installing the OS from a network or remote location.
Network installation is for a computer that participates in a network. If you are in a network then you need to have a Network Card capable of wake on LAN capabilities.
Upgrading has many advantages. Some of the advantages are:
You don't have to format and partition the computer.
You don't have to back up the data.
You can still have the old settings and applications installed in the computer.
You will get more features than the present OS in the computer.
The major plus point is you can roll back to the previous version of the operating system any time if you are facing compatibility issues or the applications do not work properly.
