Install-Module : The term 'Install-Module' is not recognized as the name of a cmdlet

Since you are using the lower version of PS:

What you can do in your case is you first download the module in your local folder.

Then, there will be a .psm1 file under that folder for this module.

You just

import-Module "Path of the file.psm1"

Here is the link to download the Azure Module: Azure Powershell

This will do your work.

Another GUI based option to fix this error is to download the PackageManagement PowerShell Modules (msi installer) from Microsoft website and install the modules.

Once this is installed you will not get "'Install-Module' is not recognized as the name of a cmdlet" error.

You should install the latest version of PowerShell, then use this command Install-Module Azure to install azure module. Because from Powershell 5.0 onwards you , you will be able to use the cmdlet to Install-Module, Save-Module

PS > $psversiontable
Name                           Value
----                           -----
PSVersion                      5.1.14393.576
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.14393.576
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

More information about install Azure PowerShell, refer to the link.