Prior to Windows PowerShell 5.0, if you want to zip or unzip the files you have to depend on COM objects, but from version 5.0 onwards (it is even available in PowerShell Core as well) there are two new cmdlets
Expand-Archive are introduced to zip & unzip the files respectively.
The code below will download the .zip file from the internet, then extracts the files from the zip and opens the extracted folder…
$Url = 'https://download.sysinternals.com/files/BGInfo.zip'
$ZipFile = 'C:\ZipFolder\' + $(Split-Path -Path $Url -Leaf)
Invoke-WebRequest -Uri $Url -OutFile $ZipFile
$ExtractShell = New-Object -ComObject Shell.Application
$Files = $ExtractShell.Namespace($ZipFile).Items()